426401331 has 4 divisors (see below), whose sum is σ = 568535112. Its totient is φ = 284267552.

The previous prime is 426401329. The next prime is 426401369. The reversal of 426401331 is 133104624.

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

It is a cyclic number.

It is not a de Polignac number, because 426401331 - 2¹ = 426401329 is a prime.

It is a super-2 number, since 2×426401331² = 363636190157143122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (426401321) 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, 71066886 + ... + 71066891.

It is an arithmetic number, because the mean of its divisors is an integer number (142133778).

Almost surely, 2^426401331 is an apocalyptic number.

426401331 is a deficient number, since it is larger than the sum of its proper divisors (142133781).

426401331 is a wasteful number, since it uses less digits than its factorization.

426401331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142133780.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 426401331 is about 20649.4874270525. The cubic root of 426401331 is about 752.6727342303.

Adding to 426401331 its reverse (133104624), we get a palindrome (559505955).

The spelling of 426401331 in words is "four hundred twenty-six million, four hundred one thousand, three hundred thirty-one".