421937 has 4 divisors (see below), whose sum is σ = 428916. Its totient is φ = 414960.

The previous prime is 421913. The next prime is 421943. The reversal of 421937 is 739124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 118336 + 303601 = 344^2 + 551^2 .

It is a cyclic number.

It is not a de Polignac number, because 421937 - 2¹⁴ = 405553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3398 + ... + 3519.

It is an arithmetic number, because the mean of its divisors is an integer number (107229).

2⁴²¹⁹³⁷ is an apocalyptic number.

It is an amenable number.

421937 is a deficient number, since it is larger than the sum of its proper divisors (6979).

421937 is an equidigital number, since it uses as much as digits as its factorization.

421937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6978.

The product of its digits is 1512, while the sum is 26.

The square root of 421937 is about 649.5667787072. The cubic root of 421937 is about 75.0036738941.

The spelling of 421937 in words is "four hundred twenty-one thousand, nine hundred thirty-seven".