72505754 has 12 divisors (see below), whose sum is σ = 109919934. Its totient is φ = 35869824.

The previous prime is 72505747. The next prime is 72505781. The reversal of 72505754 is 45750527.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 71791729 + 714025 = 8473^2 + 845^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16892 + ... + 20744.

Almost surely, 2^72505754 is an apocalyptic number.

72505754 is a deficient number, since it is larger than the sum of its proper divisors (37414180).

72505754 is an equidigital number, since it uses as much as digits as its factorization.

72505754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4049 (or 3952 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 35.

The square root of 72505754 is about 8515.0310627736. The cubic root of 72505754 is about 416.9885766912.

The spelling of 72505754 in words is "seventy-two million, five hundred five thousand, seven hundred fifty-four".