78561325 has 6 divisors (see below), whose sum is σ = 97416074. Its totient is φ = 62849040.

The previous prime is 78561283. The next prime is 78561331. The reversal of 78561325 is 52316587.

It can be written as a sum of positive squares in 3 ways, for example, as 22401289 + 56160036 = 4733^2 + 7494^2 .

It is not a de Polignac number, because 78561325 - 2⁹ = 78560813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1571202 + ... + 1571251.

Almost surely, 2^78561325 is an apocalyptic number.

It is an amenable number.

78561325 is a deficient number, since it is larger than the sum of its proper divisors (18854749).

78561325 is a wasteful number, since it uses less digits than its factorization.

78561325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142463 (or 3142458 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 78561325 is about 8863.4826676651. The cubic root of 78561325 is about 428.2883552658.

The spelling of 78561325 in words is "seventy-eight million, five hundred sixty-one thousand, three hundred twenty-five".