72642542 has 32 divisors (see below), whose sum is σ = 129641472. Its totient is φ = 29880864.

The previous prime is 72642467. The next prime is 72642587. The reversal of 72642542 is 24524627.

It is a junction number, because it is equal to n+sod(n) for n = 72642499 and 72642508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33833 + ... + 35915.

It is an arithmetic number, because the mean of its divisors is an integer number (4051296).

Almost surely, 2^72642542 is an apocalyptic number.

72642542 is a deficient number, since it is larger than the sum of its proper divisors (56998930).

72642542 is a wasteful number, since it uses less digits than its factorization.

72642542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192.

The product of its digits is 26880, while the sum is 32.

The square root of 72642542 is about 8523.0594272245. The cubic root of 72642542 is about 417.2506395769.

The spelling of 72642542 in words is "seventy-two million, six hundred forty-two thousand, five hundred forty-two".