2551420 has 48 divisors (see below), whose sum is σ = 5715360. Its totient is φ = 955136.

The previous prime is 2551403. The next prime is 2551421. The reversal of 2551420 is 241552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30699 + ... + 30781.

It is an arithmetic number, because the mean of its divisors is an integer number (119070).

2^2551420 is an apocalyptic number.

2551420 is a gapful number since it is divisible by the number (20) 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 2551420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2857680).

2551420 is an abundant number, since it is smaller than the sum of its proper divisors (3163940).

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

2551420 is a wasteful number, since it uses less digits than its factorization.

2551420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 2551420 is about 1597.3164996331. The cubic root of 2551420 is about 136.6450755765.

Adding to 2551420 its reverse (241552), we get a palindrome (2792972).

The spelling of 2551420 in words is "two million, five hundred fifty-one thousand, four hundred twenty".