421375491 has 24 divisors (see below), whose sum is σ = 632080176. Its totient is φ = 270293760.

The previous prime is 421375477. The next prime is 421375519. The reversal of 421375491 is 194573124.

It is not a de Polignac number, because 421375491 - 2⁷ = 421375363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421325491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19116 + ... + 34758.

It is an arithmetic number, because the mean of its divisors is an integer number (26336674).

Almost surely, 2^421375491 is an apocalyptic number.

421375491 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

421375491 is a deficient number, since it is larger than the sum of its proper divisors (210704685).

421375491 is a wasteful number, since it uses less digits than its factorization.

421375491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15763 (or 15760 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 421375491 is about 20527.4326451215. The cubic root of 421375491 is about 749.7038777642.

The spelling of 421375491 in words is "four hundred twenty-one million, three hundred seventy-five thousand, four hundred ninety-one".