2661372 has 72 divisors (see below), whose sum is σ = 7862400. Its totient is φ = 743328.

The previous prime is 2661371. The next prime is 2661391. The reversal of 2661372 is 2731662.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14779 + ... + 14957.

It is an arithmetic number, because the mean of its divisors is an integer number (109200).

2^2661372 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 2661372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3931200).

2661372 is an abundant number, since it is smaller than the sum of its proper divisors (5201028).

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

2661372 is a wasteful number, since it uses less digits than its factorization.

2661372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 250 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 2661372 is about 1631.3712023939. The cubic root of 2661372 is about 138.5804161407.

The spelling of 2661372 in words is "two million, six hundred sixty-one thousand, three hundred seventy-two".