421053317 has 2 divisors, whose sum is σ = 421053318. Its totient is φ = 421053316.

The previous prime is 421053301. The next prime is 421053361. The reversal of 421053317 is 713350124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353665636 + 67387681 = 18806^2 + 8209^2 .

It is a cyclic number.

It is not a de Polignac number, because 421053317 - 2⁴ = 421053301 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421053397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210526658 + 210526659.

It is an arithmetic number, because the mean of its divisors is an integer number (210526659).

Almost surely, 2^421053317 is an apocalyptic number.

It is an amenable number.

421053317 is a deficient number, since it is larger than the sum of its proper divisors (1).

421053317 is an equidigital number, since it uses as much as digits as its factorization.

421053317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 421053317 is about 20519.5837433414. The cubic root of 421053317 is about 749.5127602726.

The spelling of 421053317 in words is "four hundred twenty-one million, fifty-three thousand, three hundred seventeen".