71459721 has 24 divisors (see below), whose sum is σ = 110938464. Its totient is φ = 44161920.

The previous prime is 71459699. The next prime is 71459747. The reversal of 71459721 is 12795417.

It is a happy number.

It is not a de Polignac number, because 71459721 - 2⁶ = 71459657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71459771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6766 + ... + 13736.

It is an arithmetic number, because the mean of its divisors is an integer number (4622436).

Almost surely, 2^71459721 is an apocalyptic number.

It is an amenable number.

71459721 is a deficient number, since it is larger than the sum of its proper divisors (39478743).

71459721 is a wasteful number, since it uses less digits than its factorization.

71459721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7061 (or 7058 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 71459721 is about 8453.3851799146. The cubic root of 71459721 is about 414.9735716465.

The spelling of 71459721 in words is "seventy-one million, four hundred fifty-nine thousand, seven hundred twenty-one".