125102891 has 2 divisors, whose sum is σ = 125102892. Its totient is φ = 125102890.

The previous prime is 125102759. The next prime is 125102893. The reversal of 125102891 is 198201521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125102891 is a prime.

It is a Sophie Germain prime.

Together with 125102893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125102893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62551445 + 62551446.

It is an arithmetic number, because the mean of its divisors is an integer number (62551446).

Almost surely, 2^125102891 is an apocalyptic number.

125102891 is a deficient number, since it is larger than the sum of its proper divisors (1).

125102891 is an equidigital number, since it uses as much as digits as its factorization.

125102891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 125102891 is about 11184.9403664034. The cubic root of 125102891 is about 500.1371503761.

The spelling of 125102891 in words is "one hundred twenty-five million, one hundred two thousand, eight hundred ninety-one".