3155140 has 48 divisors (see below), whose sum is σ = 7297920. Its totient is φ = 1143648.

The previous prime is 3155137. The next prime is 3155147. The reversal of 3155140 is 415513.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (3155147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137169 + ... + 137191.

It is an arithmetic number, because the mean of its divisors is an integer number (152040).

Almost surely, 2^3155140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3155140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3648960).

3155140 is an abundant number, since it is smaller than the sum of its proper divisors (4142780).

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

3155140 is a wasteful number, since it uses less digits than its factorization.

3155140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 3155140 is about 1776.2713756631. The cubic root of 3155140 is about 146.6694099579.

It can be divided in two parts, 315 and 5140, that multiplied together give a triangular number (1619100 = T₁₇₉₉).

The spelling of 3155140 in words is "three million, one hundred fifty-five thousand, one hundred forty".