71881425 has 120 divisors (see below), whose sum is σ = 166364352. Its totient is φ = 29808000.

The previous prime is 71881393. The next prime is 71881441. The reversal of 71881425 is 52418817.

It is not a de Polignac number, because 71881425 - 2⁵ = 71881393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71881425.

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 119 ways as a sum of consecutive naturals, for example, 155695 + ... + 156155.

Almost surely, 2^71881425 is an apocalyptic number.

71881425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71881425 is an abundant number, since it is smaller than the sum of its proper divisors (94482927).

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

71881425 is a wasteful number, since it uses less digits than its factorization.

71881425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501 (or 487 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 71881425 is about 8478.2913962661. The cubic root of 71881425 is about 415.7882632570.

The spelling of 71881425 in words is "seventy-one million, eight hundred eighty-one thousand, four hundred twenty-five".