2557907 has 8 divisors (see below), whose sum is σ = 2813952. Its totient is φ = 2305800.

The previous prime is 2557901. The next prime is 2557909. The reversal of 2557907 is 7097552.

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

It is a cyclic number.

It is not a de Polignac number, because 2557907 - 2⁶ = 2557843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2557901) 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, 482 + ... + 2312.

It is an arithmetic number, because the mean of its divisors is an integer number (351744).

2^2557907 is an apocalyptic number.

2557907 is a deficient number, since it is larger than the sum of its proper divisors (256045).

2557907 is a wasteful number, since it uses less digits than its factorization.

2557907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969.

The product of its (nonzero) digits is 22050, while the sum is 35.

The square root of 2557907 is about 1599.3458037585. The cubic root of 2557907 is about 136.7607845314.

The spelling of 2557907 in words is "two million, five hundred fifty-seven thousand, nine hundred seven".