421433761 has 12 divisors (see below), whose sum is σ = 511555392. Its totient is φ = 345522408.

The previous prime is 421433759. The next prime is 421433767. The reversal of 421433761 is 167334124.

It is not a de Polignac number, because 421433761 - 2¹ = 421433759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421433767) 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 11 ways as a sum of consecutive naturals, for example, 185845 + ... + 188098.

It is an arithmetic number, because the mean of its divisors is an integer number (42629616).

Almost surely, 2^421433761 is an apocalyptic number.

It is an amenable number.

421433761 is a deficient number, since it is larger than the sum of its proper divisors (90121631).

421433761 is a wasteful number, since it uses less digits than its factorization.

421433761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373980 (or 373973 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 421433761 is about 20528.8519162665. The cubic root of 421433761 is about 749.7384338252.

Adding to 421433761 its reverse (167334124), we get a palindrome (588767885).

The spelling of 421433761 in words is "four hundred twenty-one million, four hundred thirty-three thousand, seven hundred sixty-one".