42172388 has 6 divisors (see below), whose sum is σ = 73801686. Its totient is φ = 21086192.

The previous prime is 42172373. The next prime is 42172397. The reversal of 42172388 is 88327124.

It can be written as a sum of positive squares in only one way, i.e., 25786084 + 16386304 = 5078^2 + 4048^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5271545 + ... + 5271552.

It is an arithmetic number, because the mean of its divisors is an integer number (12300281).

Almost surely, 2^42172388 is an apocalyptic number.

It is an amenable number.

42172388 is a deficient number, since it is larger than the sum of its proper divisors (31629298).

42172388 is a wasteful number, since it uses less digits than its factorization.

42172388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10543101 (or 10543099 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 42172388 is about 6494.0271018837. The cubic root of 42172388 is about 348.0775909254.

The spelling of 42172388 in words is "forty-two million, one hundred seventy-two thousand, three hundred eighty-eight".