417249421 has 2 divisors, whose sum is σ = 417249422. Its totient is φ = 417249420.

The previous prime is 417249373. The next prime is 417249431. The reversal of 417249421 is 124942714.

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., 237314025 + 179935396 = 15405^2 + 13414^2 .

It is a cyclic number.

It is not a de Polignac number, because 417249421 - 2⁷ = 417249293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (417249431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208624710 + 208624711.

It is an arithmetic number, because the mean of its divisors is an integer number (208624711).

Almost surely, 2^417249421 is an apocalyptic number.

It is an amenable number.

417249421 is a deficient number, since it is larger than the sum of its proper divisors (1).

417249421 is an equidigital number, since it uses as much as digits as its factorization.

417249421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 417249421 is about 20426.6840431823. The cubic root of 417249421 is about 747.2488366213.

The spelling of 417249421 in words is "four hundred seventeen million, two hundred forty-nine thousand, four hundred twenty-one".