421437 has 8 divisors (see below), whose sum is σ = 571680. Its totient is φ = 276080.

The previous prime is 421433. The next prime is 421453. The reversal of 421437 is 734124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421437 - 2² = 421433 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1014 + ... + 1367.

It is an arithmetic number, because the mean of its divisors is an integer number (71460).

2⁴²¹⁴³⁷ is an apocalyptic number.

It is an amenable number.

421437 is a deficient number, since it is larger than the sum of its proper divisors (150243).

421437 is a wasteful number, since it uses less digits than its factorization.

421437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443.

The product of its digits is 672, while the sum is 21.

The square root of 421437 is about 649.1817927207. The cubic root of 421437 is about 74.9740354567.

It can be divided in two parts, 421 and 437, that added together give a palindrome (858).

The spelling of 421437 in words is "four hundred twenty-one thousand, four hundred thirty-seven".