72542774 has 8 divisors (see below), whose sum is σ = 115215048. Its totient is φ = 34137760.

The previous prime is 72542773. The next prime is 72542819. The reversal of 72542774 is 47724527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72542773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066772 + ... + 1066839.

It is an arithmetic number, because the mean of its divisors is an integer number (14401881).

Almost surely, 2^72542774 is an apocalyptic number.

72542774 is a deficient number, since it is larger than the sum of its proper divisors (42672274).

72542774 is a wasteful number, since it uses less digits than its factorization.

72542774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133630.

The product of its digits is 109760, while the sum is 38.

The square root of 72542774 is about 8517.2045883611. The cubic root of 72542774 is about 417.0595333153.

The spelling of 72542774 in words is "seventy-two million, five hundred forty-two thousand, seven hundred seventy-four".