71721254 has 16 divisors (see below), whose sum is σ = 117648720. Its totient is φ = 32520960.

The previous prime is 71721253. The next prime is 71721277. The reversal of 71721254 is 45212717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71721253) 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, 5762 + ... + 13290.

It is an arithmetic number, because the mean of its divisors is an integer number (7353045).

Almost surely, 2^71721254 is an apocalyptic number.

71721254 is a deficient number, since it is larger than the sum of its proper divisors (45927466).

71721254 is a wasteful number, since it uses less digits than its factorization.

71721254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7975.

The product of its digits is 3920, while the sum is 29.

The square root of 71721254 is about 8468.8401803317. The cubic root of 71721254 is about 415.4792045133.

The spelling of 71721254 in words is "seventy-one million, seven hundred twenty-one thousand, two hundred fifty-four".