421514237 has 2 divisors, whose sum is σ = 421514238. Its totient is φ = 421514236.

The previous prime is 421514207. The next prime is 421514239. The reversal of 421514237 is 732415124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420291001 + 1223236 = 20501^2 + 1106^2 .

It is a cyclic number.

It is not a de Polignac number, because 421514237 - 2¹⁸ = 421252093 is a prime.

Together with 421514239, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421514239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210757118 + 210757119.

It is an arithmetic number, because the mean of its divisors is an integer number (210757119).

Almost surely, 2^421514237 is an apocalyptic number.

It is an amenable number.

421514237 is a deficient number, since it is larger than the sum of its proper divisors (1).

421514237 is an equidigital number, since it uses as much as digits as its factorization.

421514237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 421514237 is about 20530.8118933470. The cubic root of 421514237 is about 749.7861535506.

The spelling of 421514237 in words is "four hundred twenty-one million, five hundred fourteen thousand, two hundred thirty-seven".