72525139 has 2 divisors, whose sum is σ = 72525140. Its totient is φ = 72525138.

The previous prime is 72525113. The next prime is 72525163. The reversal of 72525139 is 93152527.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72525139 - 2¹³ = 72516947 is a prime.

It is not a weakly prime, because it can be changed into another prime (72525169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36262569 + 36262570.

It is an arithmetic number, because the mean of its divisors is an integer number (36262570).

Almost surely, 2^72525139 is an apocalyptic number.

72525139 is a deficient number, since it is larger than the sum of its proper divisors (1).

72525139 is an equidigital number, since it uses as much as digits as its factorization.

72525139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 34.

The square root of 72525139 is about 8516.1692679279. The cubic root of 72525139 is about 417.0257351365.

The spelling of 72525139 in words is "seventy-two million, five hundred twenty-five thousand, one hundred thirty-nine".