71904425 has 12 divisors (see below), whose sum is σ = 90047436. Its totient is φ = 56952000.

The previous prime is 71904389. The next prime is 71904439. The reversal of 71904425 is 52440917.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1075369 + 70829056 = 1037^2 + 8416^2 .

It is not a de Polignac number, because 71904425 - 2⁶ = 71904361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71904391 and 71904400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11714 + ... + 16763.

It is an arithmetic number, because the mean of its divisors is an integer number (7503953).

Almost surely, 2^71904425 is an apocalyptic number.

It is an amenable number.

71904425 is a deficient number, since it is larger than the sum of its proper divisors (18143011).

71904425 is a wasteful number, since it uses less digits than its factorization.

71904425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28588 (or 28583 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 71904425 is about 8479.6476931533. The cubic root of 71904425 is about 415.8326053118.

The spelling of 71904425 in words is "seventy-one million, nine hundred four thousand, four hundred twenty-five".