125466421 has 2 divisors, whose sum is σ = 125466422. Its totient is φ = 125466420.

The previous prime is 125466373. The next prime is 125466431. The reversal of 125466421 is 124664521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120692196 + 4774225 = 10986^2 + 2185^2 .

It is an emirp because it is prime and its reverse (124664521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125466421 - 2⁹ = 125465909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125466431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62733210 + 62733211.

It is an arithmetic number, because the mean of its divisors is an integer number (62733211).

Almost surely, 2^125466421 is an apocalyptic number.

It is an amenable number.

125466421 is a deficient number, since it is larger than the sum of its proper divisors (1).

125466421 is an equidigital number, since it uses as much as digits as its factorization.

125466421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 31.

The square root of 125466421 is about 11201.1794468261. The cubic root of 125466421 is about 500.6211227602.

The spelling of 125466421 in words is "one hundred twenty-five million, four hundred sixty-six thousand, four hundred twenty-one".