71157621 has 8 divisors (see below), whose sum is σ = 94915840. Its totient is φ = 47418912.

The previous prime is 71157613. The next prime is 71157649. The reversal of 71157621 is 12675117.

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

It is not a de Polignac number, because 71157621 - 2³ = 71157613 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 (71157601) 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, 11361 + ... + 16473.

It is an arithmetic number, because the mean of its divisors is an integer number (11864480).

Almost surely, 2^71157621 is an apocalyptic number.

It is an amenable number.

71157621 is a deficient number, since it is larger than the sum of its proper divisors (23758219).

71157621 is a wasteful number, since it uses less digits than its factorization.

71157621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9755.

The product of its digits is 2940, while the sum is 30.

The square root of 71157621 is about 8435.4976735223. The cubic root of 71157621 is about 414.3879709250.

The spelling of 71157621 in words is "seventy-one million, one hundred fifty-seven thousand, six hundred twenty-one".