125812381 has 2 divisors, whose sum is σ = 125812382. Its totient is φ = 125812380.

The previous prime is 125812343. The next prime is 125812391. The reversal of 125812381 is 183218521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123409881 + 2402500 = 11109^2 + 1550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125812381 is a prime.

It is a super-2 number, since 2×125812381² = 31657510425778322, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125812331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62906190 + 62906191.

It is an arithmetic number, because the mean of its divisors is an integer number (62906191).

Almost surely, 2^125812381 is an apocalyptic number.

It is an amenable number.

125812381 is a deficient number, since it is larger than the sum of its proper divisors (1).

125812381 is an equidigital number, since it uses as much as digits as its factorization.

125812381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 31.

The square root of 125812381 is about 11216.6118324564. The cubic root of 125812381 is about 501.0808365678.

The spelling of 125812381 in words is "one hundred twenty-five million, eight hundred twelve thousand, three hundred eighty-one".