125347121 has 2 divisors, whose sum is σ = 125347122. Its totient is φ = 125347120.

The previous prime is 125347111. The next prime is 125347133. The reversal of 125347121 is 121743521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79852096 + 45495025 = 8936^2 + 6745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125347121 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (125347111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62673560 + 62673561.

It is an arithmetic number, because the mean of its divisors is an integer number (62673561).

Almost surely, 2^125347121 is an apocalyptic number.

It is an amenable number.

125347121 is a deficient number, since it is larger than the sum of its proper divisors (1).

125347121 is an equidigital number, since it uses as much as digits as its factorization.

125347121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 26.

The square root of 125347121 is about 11195.8528482648. The cubic root of 125347121 is about 500.4624002402.

The spelling of 125347121 in words is "one hundred twenty-five million, three hundred forty-seven thousand, one hundred twenty-one".