421003413 has 10 divisors (see below), whose sum is σ = 628906454. Its totient is φ = 280668888.

The previous prime is 421003391. The next prime is 421003421. The reversal of 421003413 is 314300124.

It can be written as a sum of positive squares in only one way, i.e., 291794724 + 129208689 = 17082^2 + 11367^2 .

It is not a de Polignac number, because 421003413 - 2¹² = 420999317 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 (421003423) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2598706 + ... + 2598867.

Almost surely, 2^421003413 is an apocalyptic number.

It is an amenable number.

421003413 is a deficient number, since it is larger than the sum of its proper divisors (207903041).

421003413 is an equidigital number, since it uses as much as digits as its factorization.

421003413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5197585 (or 5197576 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 421003413 is about 20518.3676982356. The cubic root of 421003413 is about 749.4831479004.

Adding to 421003413 its reverse (314300124), we get a palindrome (735303537).

The spelling of 421003413 in words is "four hundred twenty-one million, three thousand, four hundred thirteen".