72547242 has 16 divisors (see below), whose sum is σ = 145633152. Its totient is φ = 24092640.

The previous prime is 72547219. The next prime is 72547247. The reversal of 72547242 is 24274527.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (72547247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20683 + ... + 23934.

It is an arithmetic number, because the mean of its divisors is an integer number (9102072).

Almost surely, 2^72547242 is an apocalyptic number.

72547242 is an abundant number, since it is smaller than the sum of its proper divisors (73085910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72547242 is a wasteful number, since it uses less digits than its factorization.

72547242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44893.

The product of its digits is 31360, while the sum is 33.

The square root of 72547242 is about 8517.4668769535. The cubic root of 72547242 is about 417.0680955452.

The spelling of 72547242 in words is "seventy-two million, five hundred forty-seven thousand, two hundred forty-two".