2542856 has 8 divisors (see below), whose sum is σ = 4767870. Its totient is φ = 1271424.

The previous prime is 2542853. The next prime is 2542879. The reversal of 2542856 is 6582452.

It can be written as a sum of positive squares in only one way, i.e., 1522756 + 1020100 = 1234^2 + 1010^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2542856² = 12932233273472, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2542853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158921 + ... + 158936.

2^2542856 is an apocalyptic number.

It is an amenable number.

2542856 is a deficient number, since it is larger than the sum of its proper divisors (2225014).

2542856 is a wasteful number, since it uses less digits than its factorization.

2542856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317863 (or 317859 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

The square root of 2542856 is about 1594.6335002125. The cubic root of 2542856 is about 136.4920183000.

The spelling of 2542856 in words is "two million, five hundred forty-two thousand, eight hundred fifty-six".