72157130 has 16 divisors (see below), whose sum is σ = 133051464. Its totient is φ = 28158720.

The previous prime is 72157121. The next prime is 72157159. The reversal of 72157130 is 3175127.

It can be written as a sum of positive squares in 4 ways, for example, as 32982049 + 39175081 = 5743^2 + 6259^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72157130.

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, 87587 + ... + 88406.

Almost surely, 2^72157130 is an apocalyptic number.

72157130 is a deficient number, since it is larger than the sum of its proper divisors (60894334).

72157130 is a wasteful number, since it uses less digits than its factorization.

72157130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176041.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 72157130 is about 8494.5353021810. The cubic root of 72157130 is about 416.3191776617.

The spelling of 72157130 in words is "seventy-two million, one hundred fifty-seven thousand, one hundred thirty".