426581 has 8 divisors (see below), whose sum is σ = 471744. Its totient is φ = 383680.

The previous prime is 426563. The next prime is 426583. The reversal of 426581 is 185624.

426581 = T₁₀₃ + T₁₀₄ + ... + T₁₅₃.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426581 is a prime.

It is a super-2 number, since 2×426581² = 363942699122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 426581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426583) 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, 155 + ... + 936.

It is an arithmetic number, because the mean of its divisors is an integer number (58968).

2⁴²⁶⁵⁸¹ is an apocalyptic number.

It is an amenable number.

426581 is a deficient number, since it is larger than the sum of its proper divisors (45163).

426581 is a wasteful number, since it uses less digits than its factorization.

426581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131.

The product of its digits is 1920, while the sum is 26.

The square root of 426581 is about 653.1316865686. The cubic root of 426581 is about 75.2778435095.

The spelling of 426581 in words is "four hundred twenty-six thousand, five hundred eighty-one".