72495442 has 4 divisors (see below), whose sum is σ = 108743166. Its totient is φ = 36247720.

The previous prime is 72495427. The next prime is 72495461. The reversal of 72495442 is 24459427.

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

It can be written as a sum of positive squares in only one way, i.e., 40335201 + 32160241 = 6351^2 + 5671^2 .

It is a super-2 number, since 2×72495442² = 10511178221550728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18123859 + ... + 18123862.

Almost surely, 2^72495442 is an apocalyptic number.

72495442 is a deficient number, since it is larger than the sum of its proper divisors (36247724).

72495442 is a wasteful number, since it uses less digits than its factorization.

72495442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36247723.

The product of its digits is 80640, while the sum is 37.

The square root of 72495442 is about 8514.4255237802. The cubic root of 72495442 is about 416.9688072714.

The spelling of 72495442 in words is "seventy-two million, four hundred ninety-five thousand, four hundred forty-two".