421946451 has 24 divisors (see below), whose sum is σ = 616771584. Its totient is φ = 277950960.

The previous prime is 421946389. The next prime is 421946453. The reversal of 421946451 is 154649124.

421946451 is a `hidden beast` number, since 4 + 2 + 1 + 9 + 4 + 645 + 1 = 666.

It is not a de Polignac number, because 421946451 - 2⁷ = 421946323 is a prime.

It is a super-2 number, since 2×421946451² = 356077615022990802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421946453) 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 in 23 ways as a sum of consecutive naturals, for example, 354880 + ... + 356066.

It is an arithmetic number, because the mean of its divisors is an integer number (25698816).

Almost surely, 2^421946451 is an apocalyptic number.

421946451 is a deficient number, since it is larger than the sum of its proper divisors (194825133).

421946451 is a wasteful number, since it uses less digits than its factorization.

421946451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631 (or 1628 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 421946451 is about 20541.3351805573. The cubic root of 421946451 is about 750.0423389432.

The spelling of 421946451 in words is "four hundred twenty-one million, nine hundred forty-six thousand, four hundred fifty-one".