426209557 has 4 divisors (see below), whose sum is σ = 427130560. Its totient is φ = 425288556.

The previous prime is 426209477. The next prime is 426209591. The reversal of 426209557 is 755902624.

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 426209557 - 2¹⁵ = 426176789 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 (426204557) 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, 459807 + ... + 460732.

It is an arithmetic number, because the mean of its divisors is an integer number (106782640).

Almost surely, 2^426209557 is an apocalyptic number.

It is an amenable number.

426209557 is a deficient number, since it is larger than the sum of its proper divisors (921003).

426209557 is an equidigital number, since it uses as much as digits as its factorization.

426209557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921002.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 426209557 is about 20644.8433513069. The cubic root of 426209557 is about 752.5598791216.

The spelling of 426209557 in words is "four hundred twenty-six million, two hundred nine thousand, five hundred fifty-seven".