72155126 has 4 divisors (see below), whose sum is σ = 108232692. Its totient is φ = 36077562.

The previous prime is 72155113. The next prime is 72155183. The reversal of 72155126 is 62155127.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18038780 + ... + 18038783.

It is an arithmetic number, because the mean of its divisors is an integer number (27058173).

Almost surely, 2^72155126 is an apocalyptic number.

72155126 is a deficient number, since it is larger than the sum of its proper divisors (36077566).

72155126 is a wasteful number, since it uses less digits than its factorization.

72155126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36077565.

The product of its digits is 4200, while the sum is 29.

The square root of 72155126 is about 8494.4173431731. The cubic root of 72155126 is about 416.3153235202.

Subtracting from 72155126 its reverse (62155127), we obtain a palindrome (9999999).

The spelling of 72155126 in words is "seventy-two million, one hundred fifty-five thousand, one hundred twenty-six".