421459457 has 2 divisors, whose sum is σ = 421459458. Its totient is φ = 421459456.

The previous prime is 421459453. The next prime is 421459499. The reversal of 421459457 is 754954124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 418161601 + 3297856 = 20449^2 + 1816^2 .

It is a cyclic number.

It is not a de Polignac number, because 421459457 - 2² = 421459453 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421459453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210729728 + 210729729.

It is an arithmetic number, because the mean of its divisors is an integer number (210729729).

Almost surely, 2^421459457 is an apocalyptic number.

It is an amenable number.

421459457 is a deficient number, since it is larger than the sum of its proper divisors (1).

421459457 is an equidigital number, since it uses as much as digits as its factorization.

421459457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 41.

The square root of 421459457 is about 20529.4777576050. The cubic root of 421459457 is about 749.7536714014.

The spelling of 421459457 in words is "four hundred twenty-one million, four hundred fifty-nine thousand, four hundred fifty-seven".