72505542 has 8 divisors (see below), whose sum is σ = 145011096. Its totient is φ = 24168512.

The previous prime is 72505529. The next prime is 72505553. The reversal of 72505542 is 24550527.

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

72505542 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6042123 + ... + 6042134.

It is an arithmetic number, because the mean of its divisors is an integer number (18126387).

Almost surely, 2^72505542 is an apocalyptic number.

72505542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

72505542 is a wasteful number, since it uses less digits than its factorization.

72505542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12084262.

The product of its (nonzero) digits is 14000, while the sum is 30.

The square root of 72505542 is about 8515.0186141899. The cubic root of 72505542 is about 416.9881702790.

The spelling of 72505542 in words is "seventy-two million, five hundred five thousand, five hundred forty-two".