421426 has 4 divisors (see below), whose sum is σ = 632142. Its totient is φ = 210712.

The previous prime is 421423. The next prime is 421433. The reversal of 421426 is 624124.

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

It can be written as a sum of positive squares in only one way, i.e., 421201 + 225 = 649^2 + 15^2 .

It is not an unprimeable number, because it can be changed into a prime (421423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105355 + ... + 105358.

2⁴²¹⁴²⁶ is an apocalyptic number.

421426 is a deficient number, since it is larger than the sum of its proper divisors (210716).

421426 is a wasteful number, since it uses less digits than its factorization.

421426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210715.

The product of its digits is 384, while the sum is 19.

The square root of 421426 is about 649.1733204623. The cubic root of 421426 is about 74.9733831476.

The spelling of 421426 in words is "four hundred twenty-one thousand, four hundred twenty-six".