72406955 has 4 divisors (see below), whose sum is σ = 86888352. Its totient is φ = 57925560.

The previous prime is 72406951. The next prime is 72406963. The reversal of 72406955 is 55960427.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55960427 = 139 ⋅402593.

It is not a de Polignac number, because 72406955 - 2² = 72406951 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72406951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7240691 + ... + 7240700.

It is an arithmetic number, because the mean of its divisors is an integer number (21722088).

Almost surely, 2^72406955 is an apocalyptic number.

72406955 is a deficient number, since it is larger than the sum of its proper divisors (14481397).

72406955 is a wasteful number, since it uses less digits than its factorization.

72406955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14481396.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 72406955 is about 8509.2276382760. The cubic root of 72406955 is about 416.7990892875.

The spelling of 72406955 in words is "seventy-two million, four hundred six thousand, nine hundred fifty-five".