2121732 has 18 divisors (see below), whose sum is σ = 5363358. Its totient is φ = 707232.

The previous prime is 2121683. The next prime is 2121737. The reversal of 2121732 is 2371212.

2121732 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1153476 + 968256 = 1074^2 + 984^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is not an unprimeable number, because it can be changed into a prime (2121737) 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, 29433 + ... + 29504.

2^2121732 is an apocalyptic number.

It is an amenable number.

2121732 is an abundant number, since it is smaller than the sum of its proper divisors (3241626).

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

2121732 is a wasteful number, since it uses less digits than its factorization.

2121732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58947 (or 58942 counting only the distinct ones).

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

The square root of 2121732 is about 1456.6166276684. The cubic root of 2121732 is about 128.4981402427.

Adding to 2121732 its reverse (2371212), we get a palindrome (4492944).

The spelling of 2121732 in words is "two million, one hundred twenty-one thousand, seven hundred thirty-two".