426221401 has 4 divisors (see below), whose sum is σ = 426264832. Its totient is φ = 426177972.

The previous prime is 426221321. The next prime is 426221429. The reversal of 426221401 is 104122624.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 426221401 - 2¹³ = 426213209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426221431) 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, 760 + ... + 29206.

It is an arithmetic number, because the mean of its divisors is an integer number (106566208).

Almost surely, 2^426221401 is an apocalyptic number.

It is an amenable number.

426221401 is a deficient number, since it is larger than the sum of its proper divisors (43431).

426221401 is a wasteful number, since it uses less digits than its factorization.

426221401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43430.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 426221401 is about 20645.1302006066. The cubic root of 426221401 is about 752.5668500560.

The spelling of 426221401 in words is "four hundred twenty-six million, two hundred twenty-one thousand, four hundred one".