25078078 has 4 divisors (see below), whose sum is σ = 37617120. Its totient is φ = 12539038.

The previous prime is 25078057. The next prime is 25078087. The reversal of 25078078 is 87087052.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6269518 + ... + 6269521.

It is an arithmetic number, because the mean of its divisors is an integer number (9404280).

Almost surely, 2^25078078 is an apocalyptic number.

25078078 is a deficient number, since it is larger than the sum of its proper divisors (12539042).

25078078 is a wasteful number, since it uses less digits than its factorization.

25078078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12539041.

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 25078078 is about 5007.8017133269. The cubic root of 25078078 is about 292.7058594180.

It can be divided in two parts, 2507 and 8078, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 25078078 in words is "twenty-five million, seventy-eight thousand, seventy-eight".