421132969 has 4 divisors (see below), whose sum is σ = 425474644. Its totient is φ = 416791296.

The previous prime is 421132961. The next prime is 421132991. The reversal of 421132969 is 969231124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130873600 + 290259369 = 11440^2 + 17037^2 .

It is a cyclic number.

It is not a de Polignac number, because 421132969 - 2³ = 421132961 is a prime.

It is a super-2 number, since 2×421132969² = 354705955157509922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421132961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2170692 + ... + 2170885.

It is an arithmetic number, because the mean of its divisors is an integer number (106368661).

Almost surely, 2^421132969 is an apocalyptic number.

It is an amenable number.

421132969 is a deficient number, since it is larger than the sum of its proper divisors (4341675).

421132969 is an equidigital number, since it uses as much as digits as its factorization.

421132969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4341674.

The product of its digits is 23328, while the sum is 37.

The square root of 421132969 is about 20521.5245291377. The cubic root of 421132969 is about 749.5600198664.

The spelling of 421132969 in words is "four hundred twenty-one million, one hundred thirty-two thousand, nine hundred sixty-nine".