42172254 has 48 divisors (see below), whose sum is σ = 94648320. Its totient is φ = 13562640.

The previous prime is 42172219. The next prime is 42172297. The reversal of 42172254 is 45227124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66519 + ... + 67149.

It is an arithmetic number, because the mean of its divisors is an integer number (1971840).

Almost surely, 2^42172254 is an apocalyptic number.

42172254 is an abundant number, since it is smaller than the sum of its proper divisors (52476066).

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

42172254 is a wasteful number, since it uses less digits than its factorization.

42172254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765 (or 762 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 42172254 is about 6494.0167847027. The cubic root of 42172254 is about 348.0772222604.

Adding to 42172254 its reverse (45227124), we get a palindrome (87399378).

The spelling of 42172254 in words is "forty-two million, one hundred seventy-two thousand, two hundred fifty-four".