76405025 has 6 divisors (see below), whose sum is σ = 94742262. Its totient is φ = 61124000.

The previous prime is 76405019. The next prime is 76405039. The reversal of 76405025 is 52050467.

It can be written as a sum of positive squares in 3 ways, for example, as 906304 + 75498721 = 952^2 + 8689^2 .

It is a de Polignac number, because none of the positive numbers 2^k-76405025 is a prime.

It is a Duffinian 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, 1528076 + ... + 1528125.

It is an arithmetic number, because the mean of its divisors is an integer number (15790377).

Almost surely, 2^76405025 is an apocalyptic number.

It is an amenable number.

76405025 is a deficient number, since it is larger than the sum of its proper divisors (18337237).

76405025 is a wasteful number, since it uses less digits than its factorization.

76405025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056211 (or 3056206 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 76405025 is about 8740.9967967046. The cubic root of 76405025 is about 424.3334881524. Note that the first 3 decimals are identical.

The spelling of 76405025 in words is "seventy-six million, four hundred five thousand, twenty-five".