72501155 has 8 divisors (see below), whose sum is σ = 87048000. Its totient is φ = 57969856.

The previous prime is 72501113. The next prime is 72501193. The reversal of 72501155 is 55110527.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72501155 - 2¹² = 72497059 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13271 + ... + 17919.

It is an arithmetic number, because the mean of its divisors is an integer number (10881000).

Almost surely, 2^72501155 is an apocalyptic number.

72501155 is a deficient number, since it is larger than the sum of its proper divisors (14546845).

72501155 is a wasteful number, since it uses less digits than its factorization.

72501155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7773.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 72501155 is about 8514.7610066284. The cubic root of 72501155 is about 416.9797600529.

The spelling of 72501155 in words is "seventy-two million, five hundred one thousand, one hundred fifty-five".