426557 has 4 divisors (see below), whose sum is σ = 429120. Its totient is φ = 423996.

The previous prime is 426553. The next prime is 426563. The reversal of 426557 is 755624.

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.

It is a cyclic number.

It is not a de Polignac number, because 426557 - 2² = 426553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426551) 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, 1013 + ... + 1370.

It is an arithmetic number, because the mean of its divisors is an integer number (107280).

2⁴²⁶⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

426557 is a deficient number, since it is larger than the sum of its proper divisors (2563).

426557 is a wasteful number, since it uses less digits than its factorization.

426557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562.

The product of its digits is 8400, while the sum is 29.

The square root of 426557 is about 653.1133132926. The cubic root of 426557 is about 75.2764317400.

The spelling of 426557 in words is "four hundred twenty-six thousand, five hundred fifty-seven".