42731172 has 48 divisors (see below), whose sum is σ = 120859200. Its totient is φ = 12948480.

The previous prime is 42731147. The next prime is 42731177. The reversal of 42731172 is 27113724.

42731172 = T₃₄₃ + T₃₄₄ + ... + T₆₆₆.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (42731177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16797 + ... + 19172.

It is an arithmetic number, because the mean of its divisors is an integer number (2517900).

Almost surely, 2^42731172 is an apocalyptic number.

It is an amenable number.

42731172 is an abundant number, since it is smaller than the sum of its proper divisors (78128028).

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

42731172 is a wasteful number, since it uses less digits than its factorization.

42731172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35993 (or 35985 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 42731172 is about 6536.9084435993. The cubic root of 42731172 is about 349.6081928481.

Adding to 42731172 its reverse (27113724), we get a palindrome (69844896).

It can be divided in two parts, 4273 and 1172, that added together give a palindrome (5445).

The spelling of 42731172 in words is "forty-two million, seven hundred thirty-one thousand, one hundred seventy-two".