72855122 has 8 divisors (see below), whose sum is σ = 114034176. Its totient is φ = 34843732.

The previous prime is 72855113. The next prime is 72855127. The reversal of 72855122 is 22155827.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (72855127) 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, 791858 + ... + 791949.

It is an arithmetic number, because the mean of its divisors is an integer number (14254272).

Almost surely, 2^72855122 is an apocalyptic number.

72855122 is a deficient number, since it is larger than the sum of its proper divisors (41179054).

72855122 is a wasteful number, since it uses less digits than its factorization.

72855122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583832.

The product of its digits is 11200, while the sum is 32.

The square root of 72855122 is about 8535.5211908823. The cubic root of 72855122 is about 417.6572551143.

The spelling of 72855122 in words is "seventy-two million, eight hundred fifty-five thousand, one hundred twenty-two".