2557445 has 8 divisors (see below), whose sum is σ = 3348000. Its totient is φ = 1859920.

The previous prime is 2557441. The next prime is 2557447. The reversal of 2557445 is 5447552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2557445 - 2² = 2557441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557441) 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, 23195 + ... + 23304.

It is an arithmetic number, because the mean of its divisors is an integer number (418500).

2^2557445 is an apocalyptic number.

It is an amenable number.

2557445 is a deficient number, since it is larger than the sum of its proper divisors (790555).

2557445 is a wasteful number, since it uses less digits than its factorization.

2557445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46515.

The product of its digits is 28000, while the sum is 32.

The square root of 2557445 is about 1599.2013631810. The cubic root of 2557445 is about 136.7525502879.

The spelling of 2557445 in words is "two million, five hundred fifty-seven thousand, four hundred forty-five".