125381537 has 2 divisors, whose sum is σ = 125381538. Its totient is φ = 125381536.

The previous prime is 125381519. The next prime is 125381539. The reversal of 125381537 is 735183521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100620961 + 24760576 = 10031^2 + 4976^2 .

It is a cyclic number.

It is not a de Polignac number, because 125381537 - 2²² = 121187233 is a prime.

Together with 125381539, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 125381497 and 125381506.

It is not a weakly prime, because it can be changed into another prime (125381539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62690768 + 62690769.

It is an arithmetic number, because the mean of its divisors is an integer number (62690769).

Almost surely, 2^125381537 is an apocalyptic number.

It is an amenable number.

125381537 is a deficient number, since it is larger than the sum of its proper divisors (1).

125381537 is an equidigital number, since it uses as much as digits as its factorization.

125381537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 35.

The square root of 125381537 is about 11197.3897404708. The cubic root of 125381537 is about 500.5081992920.

The spelling of 125381537 in words is "one hundred twenty-five million, three hundred eighty-one thousand, five hundred thirty-seven".