125605619 has 2 divisors, whose sum is σ = 125605620. Its totient is φ = 125605618.

The previous prime is 125605609. The next prime is 125605633. The reversal of 125605619 is 916506521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125605619 - 2¹⁶ = 125540083 is a prime.

It is a super-2 number, since 2×125605619² = 31553543048746322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125605609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62802809 + 62802810.

It is an arithmetic number, because the mean of its divisors is an integer number (62802810).

Almost surely, 2^125605619 is an apocalyptic number.

125605619 is a deficient number, since it is larger than the sum of its proper divisors (1).

125605619 is an equidigital number, since it uses as much as digits as its factorization.

125605619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 125605619 is about 11207.3912664812. The cubic root of 125605619 is about 500.8061914122.

The spelling of 125605619 in words is "one hundred twenty-five million, six hundred five thousand, six hundred nineteen".