72242187 has 8 divisors (see below), whose sum is σ = 97642704. Its totient is φ = 47501568.

The previous prime is 72242179. The next prime is 72242189. The reversal of 72242187 is 78124227.

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

It is not a de Polignac number, because 72242187 - 2³ = 72242179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72242189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164718 + ... + 165155.

It is an arithmetic number, because the mean of its divisors is an integer number (12205338).

Almost surely, 2^72242187 is an apocalyptic number.

72242187 is a deficient number, since it is larger than the sum of its proper divisors (25400517).

72242187 is a wasteful number, since it uses less digits than its factorization.

72242187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329949.

The product of its digits is 12544, while the sum is 33.

The square root of 72242187 is about 8499.5403993392. The cubic root of 72242187 is about 416.4826956009.

The spelling of 72242187 in words is "seventy-two million, two hundred forty-two thousand, one hundred eighty-seven".