71872401 has 16 divisors (see below), whose sum is σ = 100192896. Its totient is φ = 45741696.

The previous prime is 71872397. The next prime is 71872403. The reversal of 71872401 is 10427817.

It is not a de Polignac number, because 71872401 - 2² = 71872397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71872403) 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, 65211 + ... + 66303.

It is an arithmetic number, because the mean of its divisors is an integer number (6262056).

Almost surely, 2^71872401 is an apocalyptic number.

It is an amenable number.

71872401 is a deficient number, since it is larger than the sum of its proper divisors (28320495).

71872401 is a wasteful number, since it uses less digits than its factorization.

71872401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 71872401 is about 8477.7591968633. The cubic root of 71872401 is about 415.7708631646.

The spelling of 71872401 in words is "seventy-one million, eight hundred seventy-two thousand, four hundred one".