815426 has 4 divisors (see below), whose sum is σ = 1223142. Its totient is φ = 407712.

The previous prime is 815417. The next prime is 815431. The reversal of 815426 is 624518.

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

It can be written as a sum of positive squares in only one way, i.e., 808201 + 7225 = 899^2 + 85^2 .

It is a super-2 number, since 2×815426² = 1329839122952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 815395 and 815404.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203855 + ... + 203858.

2⁸¹⁵⁴²⁶ is an apocalyptic number.

815426 is a deficient number, since it is larger than the sum of its proper divisors (407716).

815426 is a wasteful number, since it uses less digits than its factorization.

815426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407715.

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

The square root of 815426 is about 903.0094130185. The cubic root of 815426 is about 93.4246583434.

The spelling of 815426 in words is "eight hundred fifteen thousand, four hundred twenty-six".