2542978 has 8 divisors (see below), whose sum is σ = 3852540. Its totient is φ = 1258800.

The previous prime is 2542957. The next prime is 2542987. The reversal of 2542978 is 8792452.

2542978 = T₁₇₂ + T₁₇₃ + ... + T₂₇₂.

It can be written as a sum of positive squares in 2 ways, for example, as 2537649 + 5329 = 1593^2 + 73^2 .

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

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6093 + ... + 6496.

2^2542978 is an apocalyptic number.

2542978 is a deficient number, since it is larger than the sum of its proper divisors (1309562).

2542978 is a wasteful number, since it uses less digits than its factorization.

2542978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12692.

The product of its digits is 40320, while the sum is 37.

The square root of 2542978 is about 1594.6717530577. The cubic root of 2542978 is about 136.4942011160.

The spelling of 2542978 in words is "two million, five hundred forty-two thousand, nine hundred seventy-eight".