125245691 has 2 divisors, whose sum is σ = 125245692. Its totient is φ = 125245690.

The previous prime is 125245657. The next prime is 125245699. The reversal of 125245691 is 196542521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125245691 is a prime.

It is a super-2 number, since 2×125245691² = 31372966228134962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125245699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62622845 + 62622846.

It is an arithmetic number, because the mean of its divisors is an integer number (62622846).

Almost surely, 2^125245691 is an apocalyptic number.

125245691 is a deficient number, since it is larger than the sum of its proper divisors (1).

125245691 is an equidigital number, since it uses as much as digits as its factorization.

125245691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 35.

The square root of 125245691 is about 11191.3221292214. The cubic root of 125245691 is about 500.3273736063.

The spelling of 125245691 in words is "one hundred twenty-five million, two hundred forty-five thousand, six hundred ninety-one".