72402245 has 4 divisors (see below), whose sum is σ = 86882700. Its totient is φ = 57921792.

The previous prime is 72402233. The next prime is 72402247. The reversal of 72402245 is 54220427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42797764 + 29604481 = 6542^2 + 5441^2 .

It is a cyclic number.

It is not a de Polignac number, because 72402245 - 2²² = 68207941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72402247) 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, 7240220 + ... + 7240229.

It is an arithmetic number, because the mean of its divisors is an integer number (21720675).

Almost surely, 2^72402245 is an apocalyptic number.

It is an amenable number.

72402245 is a deficient number, since it is larger than the sum of its proper divisors (14480455).

72402245 is a wasteful number, since it uses less digits than its factorization.

72402245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14480454.

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 72402245 is about 8508.9508754017. The cubic root of 72402245 is about 416.7900516369.

The spelling of 72402245 in words is "seventy-two million, four hundred two thousand, two hundred forty-five".