170426 has 4 divisors (see below), whose sum is σ = 255642. Its totient is φ = 85212.

The previous prime is 170413. The next prime is 170441. The reversal of 170426 is 624071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 624071 = 7 ⋅89153.

It can be written as a sum of positive squares in only one way, i.e., 148225 + 22201 = 385^2 + 149^2 .

It is a junction number, because it is equal to n+sod(n) for n = 170398 and 170407.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 170426.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42605 + ... + 42608.

2¹⁷⁰⁴²⁶ is an apocalyptic number.

170426 is a deficient number, since it is larger than the sum of its proper divisors (85216).

170426 is an equidigital number, since it uses as much as digits as its factorization.

170426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85215.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 170426 is about 412.8268402127. The cubic root of 170426 is about 55.4428164097.

Adding to 170426 its reverse (624071), we get a palindrome (794497).

The spelling of 170426 in words is "one hundred seventy thousand, four hundred twenty-six".