42191272 has 16 divisors (see below), whose sum is σ = 79878240. Its totient is φ = 20890416.

The previous prime is 42191239. The next prime is 42191273. The reversal of 42191272 is 27219124.

It is a self number, because there is not a number n which added to its sum of digits gives 42191272.

It is not an unprimeable number, because it can be changed into a prime (42191273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24778 + ... + 26425.

It is an arithmetic number, because the mean of its divisors is an integer number (4992390).

Almost surely, 2^42191272 is an apocalyptic number.

It is an amenable number.

42191272 is a deficient number, since it is larger than the sum of its proper divisors (37686968).

42191272 is a wasteful number, since it uses less digits than its factorization.

42191272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51312 (or 51308 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 42191272 is about 6495.4808905885. The cubic root of 42191272 is about 348.1295373662.

The spelling of 42191272 in words is "forty-two million, one hundred ninety-one thousand, two hundred seventy-two".