72420535 has 16 divisors (see below), whose sum is σ = 95751072. Its totient is φ = 52144000.

The previous prime is 72420503. The next prime is 72420547. The reversal of 72420535 is 53502427.

72420535 = 330² + 331² + ... + 632².

It is not a de Polignac number, because 72420535 - 2⁵ = 72420503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 964 + ... + 12073.

It is an arithmetic number, because the mean of its divisors is an integer number (5984442).

Almost surely, 2^72420535 is an apocalyptic number.

72420535 is a deficient number, since it is larger than the sum of its proper divisors (23330537).

72420535 is a wasteful number, since it uses less digits than its factorization.

72420535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13154.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 72420535 is about 8510.0255581285. The cubic root of 72420535 is about 416.8251446935.

The spelling of 72420535 in words is "seventy-two million, four hundred twenty thousand, five hundred thirty-five".