71012557 has 16 divisors (see below), whose sum is σ = 93196800. Its totient is φ = 52421040.

The previous prime is 71012549. The next prime is 71012573. The reversal of 71012557 is 75521017.

It is not a de Polignac number, because 71012557 - 2³ = 71012549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71012507) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 22807 + ... + 25732.

It is an arithmetic number, because the mean of its divisors is an integer number (5824800).

Almost surely, 2^71012557 is an apocalyptic number.

71012557 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

71012557 is a deficient number, since it is larger than the sum of its proper divisors (22184243).

71012557 is a wasteful number, since it uses less digits than its factorization.

71012557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48576.

The product of its (nonzero) digits is 2450, while the sum is 28.

The square root of 71012557 is about 8426.8948610980. The cubic root of 71012557 is about 414.1061848876.

The spelling of 71012557 in words is "seventy-one million, twelve thousand, five hundred fifty-seven".