78465925 has 6 divisors (see below), whose sum is σ = 97297778. Its totient is φ = 62772720.

The previous prime is 78465901. The next prime is 78465973. The reversal of 78465925 is 52956487.

It can be written as a sum of positive squares in 3 ways, for example, as 22410756 + 56055169 = 4734^2 + 7487^2 .

It is a de Polignac number, because none of the positive numbers 2^k-78465925 is a prime.

It is a super-2 number, since 2×78465925² = 12313802772211250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1569294 + ... + 1569343.

Almost surely, 2^78465925 is an apocalyptic number.

It is an amenable number.

78465925 is a deficient number, since it is larger than the sum of its proper divisors (18831853).

78465925 is a wasteful number, since it uses less digits than its factorization.

78465925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3138647 (or 3138642 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The square root of 78465925 is about 8858.0994011131. The cubic root of 78465925 is about 428.1149227742.

The spelling of 78465925 in words is "seventy-eight million, four hundred sixty-five thousand, nine hundred twenty-five".