42172426 has 8 divisors (see below), whose sum is σ = 63321984. Its totient is φ = 21065100.

The previous prime is 42172397. The next prime is 42172439. The reversal of 42172426 is 62427124.

It is a happy number.

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 = 42172394 and 42172403.

It is an unprimeable number.

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, 7930 + ... + 12133.

It is an arithmetic number, because the mean of its divisors is an integer number (7915248).

Almost surely, 2^42172426 is an apocalyptic number.

42172426 is a deficient number, since it is larger than the sum of its proper divisors (21149558).

42172426 is a wasteful number, since it uses less digits than its factorization.

42172426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21116.

The product of its digits is 5376, while the sum is 28.

The square root of 42172426 is about 6494.0300276485. The cubic root of 42172426 is about 348.0776954720.

The spelling of 42172426 in words is "forty-two million, one hundred seventy-two thousand, four hundred twenty-six".