125010421 has 2 divisors, whose sum is σ = 125010422. Its totient is φ = 125010420.

The previous prime is 125010419. The next prime is 125010433. The reversal of 125010421 is 124010521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81252196 + 43758225 = 9014^2 + 6615^2 .

It is a cyclic number.

It is not a de Polignac number, because 125010421 - 2¹ = 125010419 is a prime.

Together with 125010419, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 125010395 and 125010404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125010461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62505210 + 62505211.

It is an arithmetic number, because the mean of its divisors is an integer number (62505211).

Almost surely, 2^125010421 is an apocalyptic number.

It is an amenable number.

125010421 is a deficient number, since it is larger than the sum of its proper divisors (1).

125010421 is an equidigital number, since it uses as much as digits as its factorization.

125010421 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 16.

The square root of 125010421 is about 11180.8059190740. The cubic root of 125010421 is about 500.0138942806.

Adding to 125010421 its reverse (124010521), we get a palindrome (249020942).

The spelling of 125010421 in words is "one hundred twenty-five million, ten thousand, four hundred twenty-one".