2557867 has 8 divisors (see below), whose sum is σ = 2822400. Its totient is φ = 2303040.

The previous prime is 2557861. The next prime is 2557879. The reversal of 2557867 is 7687552.

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 2557867 - 2¹⁵ = 2525099 is a prime.

It is a super-3 number, since 3×2557867³ = 50205943336521100089, which contains 333 as substring.

It is a Duffinian number.

2557867 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2557861) 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, 1867 + ... + 2932.

It is an arithmetic number, because the mean of its divisors is an integer number (352800).

2^2557867 is an apocalyptic number.

2557867 is a deficient number, since it is larger than the sum of its proper divisors (264533).

2557867 is a wasteful number, since it uses less digits than its factorization.

2557867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4853.

The product of its digits is 117600, while the sum is 40.

The square root of 2557867 is about 1599.3332985966. Note that the first 3 decimals coincide. The cubic root of 2557867 is about 136.7600716491.

The spelling of 2557867 in words is "two million, five hundred fifty-seven thousand, eight hundred sixty-seven".