421580437 has 4 divisors (see below), whose sum is σ = 424900096. Its totient is φ = 418260780.

The previous prime is 421580407. The next prime is 421580443. The reversal of 421580437 is 734085124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421580437 - 2²³ = 413191829 is a prime.

It is a super-2 number, since 2×421580437² = 355460129722221938, 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 (421580407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1659639 + ... + 1659892.

It is an arithmetic number, because the mean of its divisors is an integer number (106225024).

Almost surely, 2^421580437 is an apocalyptic number.

It is an amenable number.

421580437 is a deficient number, since it is larger than the sum of its proper divisors (3319659).

421580437 is a wasteful number, since it uses less digits than its factorization.

421580437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319658.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 421580437 is about 20532.4240410138. The cubic root of 421580437 is about 749.8254035061.

The spelling of 421580437 in words is "four hundred twenty-one million, five hundred eighty thousand, four hundred thirty-seven".