172431426 has 8 divisors (see below), whose sum is σ = 344862864. Its totient is φ = 57477140.

The previous prime is 172431409. The next prime is 172431439. The reversal of 172431426 is 624134271.

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

172431426 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 172431393 and 172431402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14369280 + ... + 14369291.

It is an arithmetic number, because the mean of its divisors is an integer number (43107858).

Almost surely, 2^172431426 is an apocalyptic number.

172431426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172431426 is a wasteful number, since it uses less digits than its factorization.

172431426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28738576.

The product of its digits is 8064, while the sum is 30.

The square root of 172431426 is about 13131.3147095026. The cubic root of 172431426 is about 556.5943668078.

Adding to 172431426 its reverse (624134271), we get a palindrome (796565697).

The spelling of 172431426 in words is "one hundred seventy-two million, four hundred thirty-one thousand, four hundred twenty-six".