72542073 has 4 divisors (see below), whose sum is σ = 96722768. Its totient is φ = 48361380.

The previous prime is 72542051. The next prime is 72542101. The reversal of 72542073 is 37024527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37024527 = 3 ⋅12341509.

It is not a de Polignac number, because 72542073 - 2¹⁸ = 72279929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72542073.

It is not an unprimeable number, because it can be changed into a prime (72542003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12090343 + ... + 12090348.

It is an arithmetic number, because the mean of its divisors is an integer number (24180692).

Almost surely, 2^72542073 is an apocalyptic number.

It is an amenable number.

72542073 is a deficient number, since it is larger than the sum of its proper divisors (24180695).

72542073 is a wasteful number, since it uses less digits than its factorization.

72542073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24180694.

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 72542073 is about 8517.1634362621. The cubic root of 72542073 is about 417.0581899254.

The spelling of 72542073 in words is "seventy-two million, five hundred forty-two thousand, seventy-three".