71253025 has 12 divisors (see below), whose sum is σ = 88526700. Its totient is φ = 56890880.

The previous prime is 71253019. The next prime is 71253043. The reversal of 71253025 is 52035217.

It can be written as a sum of positive squares in 6 ways, for example, as 7907344 + 63345681 = 2812^2 + 7959^2 .

It is not a de Polignac number, because 71253025 - 2⁷ = 71252897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 11 ways as a sum of consecutive naturals, for example, 11721 + ... + 16729.

It is an arithmetic number, because the mean of its divisors is an integer number (7377225).

Almost surely, 2^71253025 is an apocalyptic number.

It is an amenable number.

71253025 is a deficient number, since it is larger than the sum of its proper divisors (17273675).

71253025 is a wasteful number, since it uses less digits than its factorization.

71253025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5588 (or 5583 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 71253025 is about 8441.1506917007. The cubic root of 71253025 is about 414.5730839841.

The spelling of 71253025 in words is "seventy-one million, two hundred fifty-three thousand, twenty-five".