421401283 has 2 divisors, whose sum is σ = 421401284. Its totient is φ = 421401282.

The previous prime is 421401221. The next prime is 421401293. The reversal of 421401283 is 382104124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421401283 is a prime.

It is not a weakly prime, because it can be changed into another prime (421401293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210700641 + 210700642.

It is an arithmetic number, because the mean of its divisors is an integer number (210700642).

Almost surely, 2^421401283 is an apocalyptic number.

421401283 is a deficient number, since it is larger than the sum of its proper divisors (1).

421401283 is an equidigital number, since it uses as much as digits as its factorization.

421401283 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 421401283 is about 20528.0608679924. The cubic root of 421401283 is about 749.7191736767.

The spelling of 421401283 in words is "four hundred twenty-one million, four hundred one thousand, two hundred eighty-three".