72546542 has 4 divisors (see below), whose sum is σ = 108819816. Its totient is φ = 36273270.

The previous prime is 72546527. The next prime is 72546553. The reversal of 72546542 is 24564527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24564527 = 13 ⋅1889579.

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, 18136634 + ... + 18136637.

It is an arithmetic number, because the mean of its divisors is an integer number (27204954).

Almost surely, 2^72546542 is an apocalyptic number.

72546542 is a deficient number, since it is larger than the sum of its proper divisors (36273274).

72546542 is a wasteful number, since it uses less digits than its factorization.

72546542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36273273.

The product of its digits is 67200, while the sum is 35.

The square root of 72546542 is about 8517.4257848249. The cubic root of 72546542 is about 417.0667541269.

The spelling of 72546542 in words is "seventy-two million, five hundred forty-six thousand, five hundred forty-two".