3172140 has 36 divisors (see below), whose sum is σ = 9622704. Its totient is φ = 845856.

The previous prime is 3172133. The next prime is 3172159. The reversal of 3172140 is 412713.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8632 + ... + 8991.

Almost surely, 2^3172140 is an apocalyptic number.

3172140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3172140 is an abundant number, since it is smaller than the sum of its proper divisors (6450564).

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

3172140 is a wasteful number, since it uses less digits than its factorization.

3172140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17638 (or 17633 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 3172140 is about 1781.0502519581. The cubic root of 3172140 is about 146.9323581617.

Adding to 3172140 its reverse (412713), we get a palindrome (3584853).

The spelling of 3172140 in words is "three million, one hundred seventy-two thousand, one hundred forty".