2051424 has 72 divisors (see below), whose sum is σ = 6191640. Its totient is φ = 642048.

The previous prime is 2051419. The next prime is 2051429. The reversal of 2051424 is 4241502.

It is an interprime number because it is at equal distance from previous prime (2051419) and next prime (2051429).

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2051397 and 2051406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4687 + ... + 5105.

It is an arithmetic number, because the mean of its divisors is an integer number (85995).

2^2051424 is an apocalyptic number.

2051424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2051424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3095820).

2051424 is an abundant number, since it is smaller than the sum of its proper divisors (4140216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2051424 is a wasteful number, since it uses less digits than its factorization.

2051424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 2051424 is about 1432.2793023709. The cubic root of 2051424 is about 127.0628163838.

Adding to 2051424 its reverse (4241502), we get a palindrome (6292926).

The spelling of 2051424 in words is "two million, fifty-one thousand, four hundred twenty-four".