125133661 has 2 divisors, whose sum is σ = 125133662. Its totient is φ = 125133660.

The previous prime is 125133653. The next prime is 125133727. The reversal of 125133661 is 166331521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106729561 + 18404100 = 10331^2 + 4290^2 .

It is a cyclic number.

It is not a de Polignac number, because 125133661 - 2³ = 125133653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125133061) 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, 62566830 + 62566831.

It is an arithmetic number, because the mean of its divisors is an integer number (62566831).

Almost surely, 2^125133661 is an apocalyptic number.

It is an amenable number.

125133661 is a deficient number, since it is larger than the sum of its proper divisors (1).

125133661 is an equidigital number, since it uses as much as digits as its factorization.

125133661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 125133661 is about 11186.3157920738. The cubic root of 125133661 is about 500.1781511834.

The spelling of 125133661 in words is "one hundred twenty-five million, one hundred thirty-three thousand, six hundred sixty-one".