16172426 has 4 divisors (see below), whose sum is σ = 24258642. Its totient is φ = 8086212.

The previous prime is 16172417. The next prime is 16172449. The reversal of 16172426 is 62427161.

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., 15202201 + 970225 = 3899^2 + 985^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4043105 + ... + 4043108.

Almost surely, 2^16172426 is an apocalyptic number.

16172426 is a deficient number, since it is larger than the sum of its proper divisors (8086216).

16172426 is an equidigital number, since it uses as much as digits as its factorization.

16172426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8086215.

The product of its digits is 4032, while the sum is 29.

The square root of 16172426 is about 4021.4954929727. The cubic root of 16172426 is about 252.8861574922.

Adding to 16172426 its reverse (62427161), we get a palindrome (78599587).

The spelling of 16172426 in words is "sixteen million, one hundred seventy-two thousand, four hundred twenty-six".