125413121 has 2 divisors, whose sum is σ = 125413122. Its totient is φ = 125413120.

The previous prime is 125413103. The next prime is 125413177. The reversal of 125413121 is 121314521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100801600 + 24611521 = 10040^2 + 4961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125413121 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 125413093 and 125413102.

It is not a weakly prime, because it can be changed into another prime (125413021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62706560 + 62706561.

It is an arithmetic number, because the mean of its divisors is an integer number (62706561).

Almost surely, 2^125413121 is an apocalyptic number.

It is an amenable number.

125413121 is a deficient number, since it is larger than the sum of its proper divisors (1).

125413121 is an equidigital number, since it uses as much as digits as its factorization.

125413121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 20.

The square root of 125413121 is about 11198.7999803550. The cubic root of 125413121 is about 500.5502222888.

Adding to 125413121 its reverse (121314521), we get a palindrome (246727642).

The spelling of 125413121 in words is "one hundred twenty-five million, four hundred thirteen thousand, one hundred twenty-one".