125235421 has 2 divisors, whose sum is σ = 125235422. Its totient is φ = 125235420.

The previous prime is 125235377. The next prime is 125235457. The reversal of 125235421 is 124532521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125216100 + 19321 = 11190^2 + 139^2 .

It is an emirp because it is prime and its reverse (124532521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125235421 - 2⁷ = 125235293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125235521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62617710 + 62617711.

It is an arithmetic number, because the mean of its divisors is an integer number (62617711).

Almost surely, 2^125235421 is an apocalyptic number.

It is an amenable number.

125235421 is a deficient number, since it is larger than the sum of its proper divisors (1).

125235421 is an equidigital number, since it uses as much as digits as its factorization.

125235421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 25.

The square root of 125235421 is about 11190.8632821601. The cubic root of 125235421 is about 500.3136978129.

Adding to 125235421 its reverse (124532521), we get a palindrome (249767942).

The spelling of 125235421 in words is "one hundred twenty-five million, two hundred thirty-five thousand, four hundred twenty-one".