421000297 has 2 divisors, whose sum is σ = 421000298. Its totient is φ = 421000296.

The previous prime is 421000289. The next prime is 421000313. The reversal of 421000297 is 792000124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 329204736 + 91795561 = 18144^2 + 9581^2 .

It is a cyclic number.

It is not a de Polignac number, because 421000297 - 2³ = 421000289 is a prime.

It is not a weakly prime, because it can be changed into another prime (421000207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210500148 + 210500149.

It is an arithmetic number, because the mean of its divisors is an integer number (210500149).

Almost surely, 2^421000297 is an apocalyptic number.

It is an amenable number.

421000297 is a deficient number, since it is larger than the sum of its proper divisors (1).

421000297 is an equidigital number, since it uses as much as digits as its factorization.

421000297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 421000297 is about 20518.2917661291. The cubic root of 421000297 is about 749.4812988296.

The spelling of 421000297 in words is "four hundred twenty-one million, two hundred ninety-seven", and thus it is an aban number.