421815467 has 2 divisors, whose sum is σ = 421815468. Its totient is φ = 421815466.

The previous prime is 421815463. The next prime is 421815497. The reversal of 421815467 is 764518124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421815467 - 2² = 421815463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421815467.

It is not a weakly prime, because it can be changed into another prime (421815463) 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, 210907733 + 210907734.

It is an arithmetic number, because the mean of its divisors is an integer number (210907734).

Almost surely, 2^421815467 is an apocalyptic number.

421815467 is a deficient number, since it is larger than the sum of its proper divisors (1).

421815467 is an equidigital number, since it uses as much as digits as its factorization.

421815467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 38.

The square root of 421815467 is about 20538.1466301125. The cubic root of 421815467 is about 749.9647195256.

The spelling of 421815467 in words is "four hundred twenty-one million, eight hundred fifteen thousand, four hundred sixty-seven".