125214421 has 2 divisors, whose sum is σ = 125214422. Its totient is φ = 125214420.

The previous prime is 125214413. The next prime is 125214437. The reversal of 125214421 is 124412521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89680900 + 35533521 = 9470^2 + 5961^2 .

It is a cyclic number.

It is not a de Polignac number, because 125214421 - 2³ = 125214413 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 125214392 and 125214401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125212421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62607210 + 62607211.

It is an arithmetic number, because the mean of its divisors is an integer number (62607211).

Almost surely, 2^125214421 is an apocalyptic number.

It is an amenable number.

125214421 is a deficient number, since it is larger than the sum of its proper divisors (1).

125214421 is an equidigital number, since it uses as much as digits as its factorization.

125214421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 640, while the sum is 22.

The square root of 125214421 is about 11189.9249774071. The cubic root of 125214421 is about 500.2857313508.

Adding to 125214421 its reverse (124412521), we get a palindrome (249626942).

The spelling of 125214421 in words is "one hundred twenty-five million, two hundred fourteen thousand, four hundred twenty-one".