40172 has 18 divisors (see below), whose sum is σ = 78204. Its totient is φ = 18040.

The previous prime is 40169. The next prime is 40177. The reversal of 40172 is 27104.

It is a happy number.

It is a super-2 number, since 2×40172² = 3227579168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40177) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 443 + ... + 525.

2⁴⁰¹⁷² is an apocalyptic number.

It is an amenable number.

40172 is a deficient number, since it is larger than the sum of its proper divisors (38032).

40172 is a wasteful number, since it uses less digits than its factorization.

40172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 40172 is about 200.4295387412. The cubic root of 40172 is about 34.2484681504.

Adding to 40172 its sum of digits (14), we get a triangular number (40186 = T₂₈₃).

Adding to 40172 its reverse (27104), we get a palindrome (67276).

It can be divided in two parts, 40 and 172, that added together give a palindrome (212).

The spelling of 40172 in words is "forty thousand, one hundred seventy-two", and thus it is an iban number.