2557520 has 40 divisors (see below), whose sum is σ = 6797184. Its totient is φ = 876672.

The previous prime is 2557519. The next prime is 2557553. The reversal of 2557520 is 257552.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 2557520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1724 + ... + 2843.

2^2557520 is an apocalyptic number.

2557520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2557520 is an abundant number, since it is smaller than the sum of its proper divisors (4239664).

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

2557520 is a wasteful number, since it uses less digits than its factorization.

2557520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4587 (or 4581 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 26.

The square root of 2557520 is about 1599.2248122137. The cubic root of 2557520 is about 136.7538870832.

Subtracting from 2557520 its reverse (257552), we obtain a cube (2299968 = 132³).

The spelling of 2557520 in words is "two million, five hundred fifty-seven thousand, five hundred twenty".