421342487 has 2 divisors, whose sum is σ = 421342488. Its totient is φ = 421342486.

The previous prime is 421342447. The next prime is 421342517. The reversal of 421342487 is 784243124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421342487 - 2¹⁶ = 421276951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421342417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210671243 + 210671244.

It is an arithmetic number, because the mean of its divisors is an integer number (210671244).

Almost surely, 2^421342487 is an apocalyptic number.

421342487 is a deficient number, since it is larger than the sum of its proper divisors (1).

421342487 is an equidigital number, since it uses as much as digits as its factorization.

421342487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 35.

The square root of 421342487 is about 20526.6287295308. The cubic root of 421342487 is about 749.6843038740.

The spelling of 421342487 in words is "four hundred twenty-one million, three hundred forty-two thousand, four hundred eighty-seven".