72641542 has 4 divisors (see below), whose sum is σ = 108962316. Its totient is φ = 36320770.

The previous prime is 72641531. The next prime is 72641557. The reversal of 72641542 is 24514627.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18160384 + ... + 18160387.

It is an arithmetic number, because the mean of its divisors is an integer number (27240579).

Almost surely, 2^72641542 is an apocalyptic number.

72641542 is a deficient number, since it is larger than the sum of its proper divisors (36320774).

72641542 is a wasteful number, since it uses less digits than its factorization.

72641542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36320773.

The product of its digits is 13440, while the sum is 31.

The square root of 72641542 is about 8523.0007626422. Note that the first 3 decimals coincide. The cubic root of 72641542 is about 417.2487249388.

The spelling of 72641542 in words is "seventy-two million, six hundred forty-one thousand, five hundred forty-two".