172426 has 8 divisors (see below), whose sum is σ = 262404. Its totient is φ = 84960.

The previous prime is 172423. The next prime is 172427. The reversal of 172426 is 624271.

It can be written as a sum of positive squares in 2 ways, for example, as 159201 + 13225 = 399^2 + 115^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 172397 and 172406.

It is not an unprimeable number, because it can be changed into a prime (172421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445 + ... + 736.

2¹⁷²⁴²⁶ is an apocalyptic number.

172426 is a deficient number, since it is larger than the sum of its proper divisors (89978).

172426 is a wasteful number, since it uses less digits than its factorization.

172426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256.

The product of its digits is 672, while the sum is 22.

The square root of 172426 is about 415.2420980585. The cubic root of 172426 is about 55.6588528520.

Adding to 172426 its reverse (624271), we get a palindrome (796697).

It can be divided in two parts, 1 and 72426, that added together give a palindrome (72427).

The spelling of 172426 in words is "one hundred seventy-two thousand, four hundred twenty-six".