2161372 has 6 divisors (see below), whose sum is σ = 3782408. Its totient is φ = 1080684.

The previous prime is 2161349. The next prime is 2161373. The reversal of 2161372 is 2731612.

2161372 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 2⁹ + 1 + 6⁶ + 1 + 3⁵ + 7⁵ + 2²¹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270168 + ... + 270175.

2^2161372 is an apocalyptic number.

It is an amenable number.

2161372 is a deficient number, since it is larger than the sum of its proper divisors (1621036).

2161372 is a wasteful number, since it uses less digits than its factorization.

2161372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540347 (or 540345 counting only the distinct ones).

The product of its digits is 504, while the sum is 22.

The square root of 2161372 is about 1470.1605354518. The cubic root of 2161372 is about 129.2934449091.

Adding to 2161372 its reverse (2731612), we get a palindrome (4892984).

The spelling of 2161372 in words is "two million, one hundred sixty-one thousand, three hundred seventy-two".