71051057 has 8 divisors (see below), whose sum is σ = 88583232. Its totient is φ = 55364400.

The previous prime is 71051053. The next prime is 71051059. The reversal of 71051057 is 75015017.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71051057 - 2² = 71051053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71051053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461294 + ... + 461447.

It is an arithmetic number, because the mean of its divisors is an integer number (11072904).

Almost surely, 2^71051057 is an apocalyptic number.

71051057 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

71051057 is a deficient number, since it is larger than the sum of its proper divisors (17532175).

71051057 is a wasteful number, since it uses less digits than its factorization.

71051057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922759.

The product of its (nonzero) digits is 1225, while the sum is 26.

The square root of 71051057 is about 8429.1789042587. The cubic root of 71051057 is about 414.1810083105.

The spelling of 71051057 in words is "seventy-one million, fifty-one thousand, fifty-seven".