72125569 has 2 divisors, whose sum is σ = 72125570. Its totient is φ = 72125568.

The previous prime is 72125551. The next prime is 72125593. The reversal of 72125569 is 96552127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48233025 + 23892544 = 6945^2 + 4888^2 .

It is a cyclic number.

It is not a de Polignac number, because 72125569 - 2⁹ = 72125057 is a prime.

It is a super-2 number, since 2×72125569² = 10404195407147522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72125069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36062784 + 36062785.

It is an arithmetic number, because the mean of its divisors is an integer number (36062785).

Almost surely, 2^72125569 is an apocalyptic number.

It is an amenable number.

72125569 is a deficient number, since it is larger than the sum of its proper divisors (1).

72125569 is an equidigital number, since it uses as much as digits as its factorization.

72125569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The square root of 72125569 is about 8492.6773752451. The cubic root of 72125569 is about 416.2584704905.

The spelling of 72125569 in words is "seventy-two million, one hundred twenty-five thousand, five hundred sixty-nine".