125591099 has 2 divisors, whose sum is σ = 125591100. Its totient is φ = 125591098.

The previous prime is 125591069. The next prime is 125591129. The reversal of 125591099 is 990195521.

It is a balanced prime because it is at equal distance from previous prime (125591069) and next prime (125591129).

It is a cyclic number.

It is not a de Polignac number, because 125591099 - 2¹⁶ = 125525563 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125591069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62795549 + 62795550.

It is an arithmetic number, because the mean of its divisors is an integer number (62795550).

Almost surely, 2^125591099 is an apocalyptic number.

125591099 is a deficient number, since it is larger than the sum of its proper divisors (1).

125591099 is an equidigital number, since it uses as much as digits as its factorization.

125591099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36450, while the sum is 41.

The square root of 125591099 is about 11206.7434609703. The cubic root of 125591099 is about 500.7868929493.

The spelling of 125591099 in words is "one hundred twenty-five million, five hundred ninety-one thousand, ninety-nine".