71774825 has 6 divisors (see below), whose sum is σ = 89000814. Its totient is φ = 57419840.

The previous prime is 71774771. The next prime is 71774873. The reversal of 71774825 is 52847717.

It can be written as a sum of positive squares in 3 ways, for example, as 9554281 + 62220544 = 3091^2 + 7888^2 .

It is a de Polignac number, because none of the positive numbers 2^k-71774825 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, 1435472 + ... + 1435521.

It is an arithmetic number, because the mean of its divisors is an integer number (14833469).

Almost surely, 2^71774825 is an apocalyptic number.

It is an amenable number.

71774825 is a deficient number, since it is larger than the sum of its proper divisors (17225989).

71774825 is a wasteful number, since it uses less digits than its factorization.

71774825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871003 (or 2870998 counting only the distinct ones).

The product of its digits is 109760, while the sum is 41.

The square root of 71774825 is about 8472.0024197353. The cubic root of 71774825 is about 415.5826238666.

Subtracting from 71774825 its sum of digits (41), we obtain a square (71774784 = 8472²).

The spelling of 71774825 in words is "seventy-one million, seven hundred seventy-four thousand, eight hundred twenty-five".