421615297 has 2 divisors, whose sum is σ = 421615298. Its totient is φ = 421615296.

The previous prime is 421615279. The next prime is 421615303. The reversal of 421615297 is 792516124.

Together with previous prime (421615279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245893761 + 175721536 = 15681^2 + 13256^2 .

It is a cyclic number.

It is not a de Polignac number, because 421615297 - 2⁷ = 421615169 is a prime.

It is not a weakly prime, because it can be changed into another prime (421615237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210807648 + 210807649.

It is an arithmetic number, because the mean of its divisors is an integer number (210807649).

Almost surely, 2^421615297 is an apocalyptic number.

It is an amenable number.

421615297 is a deficient number, since it is larger than the sum of its proper divisors (1).

421615297 is an equidigital number, since it uses as much as digits as its factorization.

421615297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 421615297 is about 20533.2729246947. The cubic root of 421615297 is about 749.8460703356.

The spelling of 421615297 in words is "four hundred twenty-one million, six hundred fifteen thousand, two hundred ninety-seven".