421087919 has 6 divisors (see below), whose sum is σ = 489837024. Its totient is φ = 360932460.

The previous prime is 421087913. The next prime is 421087957. The reversal of 421087919 is 919780124.

It is not a de Polignac number, because 421087919 - 2²⁰ = 420039343 is a prime.

It is a super-2 number, since 2×421087919² = 354630071055501122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421087913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4296767 + ... + 4296864.

It is an arithmetic number, because the mean of its divisors is an integer number (81639504).

Almost surely, 2^421087919 is an apocalyptic number.

421087919 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

421087919 is a deficient number, since it is larger than the sum of its proper divisors (68749105).

421087919 is an equidigital number, since it uses as much as digits as its factorization.

421087919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8593645 (or 8593638 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 421087919 is about 20520.4268717783. The cubic root of 421087919 is about 749.5332912671.

It can be divided in two parts, 4210 and 87919, that added together give a palindrome (92129).

The spelling of 421087919 in words is "four hundred twenty-one million, eighty-seven thousand, nine hundred nineteen".