420881597 has 12 divisors (see below), whose sum is σ = 470335356. Its totient is φ = 375269760.

The previous prime is 420881567. The next prime is 420881599. The reversal of 420881597 is 795188024.

It can be written as a sum of positive squares in 2 ways, for example, as 211818916 + 209062681 = 14554^2 + 14459^2 .

It is not a de Polignac number, because 420881597 - 2⁸ = 420881341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420881599) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28154 + ... + 40427.

It is an arithmetic number, because the mean of its divisors is an integer number (39194613).

Almost surely, 2^420881597 is an apocalyptic number.

It is an amenable number.

420881597 is a deficient number, since it is larger than the sum of its proper divisors (49453759).

420881597 is a wasteful number, since it uses less digits than its factorization.

420881597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68636 (or 68617 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 420881597 is about 20515.3990212231. The cubic root of 420881597 is about 749.4108540714.

The spelling of 420881597 in words is "four hundred twenty million, eight hundred eighty-one thousand, five hundred ninety-seven".