2051240 has 32 divisors (see below), whose sum is σ = 4860000. Its totient is φ = 777024.

The previous prime is 2051233. The next prime is 2051249. The reversal of 2051240 is 421502.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2051249) 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 7 ways as a sum of consecutive naturals, for example, 590 + ... + 2109.

It is an arithmetic number, because the mean of its divisors is an integer number (151875).

2^2051240 is an apocalyptic number.

2051240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2051240 is an abundant number, since it is smaller than the sum of its proper divisors (2808760).

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

2051240 is a wasteful number, since it uses less digits than its factorization.

2051240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2729 (or 2725 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2051240 is about 1432.2150676487. The cubic root of 2051240 is about 127.0590173549.

Adding to 2051240 its reverse (421502), we get a palindrome (2472742).

The spelling of 2051240 in words is "two million, fifty-one thousand, two hundred forty".