72142497 has 24 divisors (see below), whose sum is σ = 119822976. Its totient is φ = 40971456.

The previous prime is 72142471. The next prime is 72142501. The reversal of 72142497 is 79424127.

It is not a de Polignac number, because 72142497 - 2⁸ = 72142241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72142457) 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, 7093 + ... + 13949.

It is an arithmetic number, because the mean of its divisors is an integer number (4992624).

Almost surely, 2^72142497 is an apocalyptic number.

It is an amenable number.

72142497 is a deficient number, since it is larger than the sum of its proper divisors (47680479).

72142497 is a wasteful number, since it uses less digits than its factorization.

72142497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7037 (or 7034 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 72142497 is about 8493.6739400568. The cubic root of 72142497 is about 416.2910334788.

The spelling of 72142497 in words is "seventy-two million, one hundred forty-two thousand, four hundred ninety-seven".