125365391 has 2 divisors, whose sum is σ = 125365392. Its totient is φ = 125365390.

The previous prime is 125365349. The next prime is 125365393. The reversal of 125365391 is 193563521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125365391 is a prime.

Together with 125365393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125365393) 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, 62682695 + 62682696.

It is an arithmetic number, because the mean of its divisors is an integer number (62682696).

Almost surely, 2^125365391 is an apocalyptic number.

125365391 is a deficient number, since it is larger than the sum of its proper divisors (1).

125365391 is an equidigital number, since it uses as much as digits as its factorization.

125365391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 35.

The square root of 125365391 is about 11196.6687456582. The cubic root of 125365391 is about 500.4867140651.

The spelling of 125365391 in words is "one hundred twenty-five million, three hundred sixty-five thousand, three hundred ninety-one".