125410121 has 2 divisors, whose sum is σ = 125410122. Its totient is φ = 125410120.

The previous prime is 125410093. The next prime is 125410133. The reversal of 125410121 is 121014521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77246521 + 48163600 = 8789^2 + 6940^2 .

It is an emirp because it is prime and its reverse (121014521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125410121 is a prime.

It is a Sophie Germain prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 125410121.

It is not a weakly prime, because it can be changed into another prime (125410151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62705060 + 62705061.

It is an arithmetic number, because the mean of its divisors is an integer number (62705061).

Almost surely, 2^125410121 is an apocalyptic number.

It is an amenable number.

125410121 is a deficient number, since it is larger than the sum of its proper divisors (1).

125410121 is an equidigital number, since it uses as much as digits as its factorization.

125410121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 125410121 is about 11198.6660366313. Note that the first 3 decimals coincide. The cubic root of 125410121 is about 500.5462310460.

Adding to 125410121 its reverse (121014521), we get a palindrome (246424642).

The spelling of 125410121 in words is "one hundred twenty-five million, four hundred ten thousand, one hundred twenty-one".