71257641 has 16 divisors (see below), whose sum is σ = 116936064. Its totient is φ = 37586304.

The previous prime is 71257633. The next prime is 71257679. The reversal of 71257641 is 14675217.

It is not a de Polignac number, because 71257641 - 2³ = 71257633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71257601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130236 + ... + 130781.

It is an arithmetic number, because the mean of its divisors is an integer number (7308504).

Almost surely, 2^71257641 is an apocalyptic number.

It is an amenable number.

71257641 is a deficient number, since it is larger than the sum of its proper divisors (45678423).

71257641 is a wasteful number, since it uses less digits than its factorization.

71257641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261040.

The product of its digits is 11760, while the sum is 33.

The square root of 71257641 is about 8441.4241097104. The cubic root of 71257641 is about 414.5820362498.

The spelling of 71257641 in words is "seventy-one million, two hundred fifty-seven thousand, six hundred forty-one".