2155732 has 12 divisors (see below), whose sum is σ = 3798900. Its totient is φ = 1070336.

The previous prime is 2155723. The next prime is 2155733. The reversal of 2155732 is 2375512.

It can be written as a sum of positive squares in 2 ways, for example, as 93636 + 2062096 = 306^2 + 1436^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2155697 and 2155706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1213 + ... + 2404.

It is an arithmetic number, because the mean of its divisors is an integer number (316575).

2^2155732 is an apocalyptic number.

It is an amenable number.

2155732 is a deficient number, since it is larger than the sum of its proper divisors (1643168).

2155732 is a wasteful number, since it uses less digits than its factorization.

2155732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770 (or 3768 counting only the distinct ones).

The product of its digits is 2100, while the sum is 25.

The square root of 2155732 is about 1468.2411246113. The cubic root of 2155732 is about 129.1808851963.

The spelling of 2155732 in words is "two million, one hundred fifty-five thousand, seven hundred thirty-two".