2557560 has 32 divisors (see below), whose sum is σ = 7673040. Its totient is φ = 681984.

The previous prime is 2557553. The next prime is 2557561. The reversal of 2557560 is 657552.

It is a super-2 number, since 2×2557560² = 13082226307200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10537 + ... + 10776.

2^2557560 is an apocalyptic number.

2557560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2557560 is an abundant number, since it is smaller than the sum of its proper divisors (5115480).

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

2557560 is a wasteful number, since it uses less digits than its factorization.

2557560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21327 (or 21323 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 2557560 is about 1599.2373182239. The cubic root of 2557560 is about 136.7546000300.

The spelling of 2557560 in words is "two million, five hundred fifty-seven thousand, five hundred sixty".