71705025 has 72 divisors (see below), whose sum is σ = 149722560. Its totient is φ = 32123520.

The previous prime is 71705021. The next prime is 71705027. The reversal of 71705025 is 52050717.

It is not a de Polignac number, because 71705025 - 2² = 71705021 is a prime.

It is a super-2 number, since 2×71705025² = 10283221220501250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71705025.

It is not an unprimeable number, because it can be changed into a prime (71705021) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 83046 + ... + 83904.

It is an arithmetic number, because the mean of its divisors is an integer number (2079480).

Almost surely, 2^71705025 is an apocalyptic number.

71705025 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71705025 is an abundant number, since it is smaller than the sum of its proper divisors (78017535).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71705025 is a wasteful number, since it uses less digits than its factorization.

71705025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935 (or 927 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 71705025 is about 8467.8819665841. The cubic root of 71705025 is about 415.4478641027.

The spelling of 71705025 in words is "seventy-one million, seven hundred five thousand, twenty-five".