2161237 has 8 divisors (see below), whose sum is σ = 2356704. Its totient is φ = 1969968.

The previous prime is 2161213. The next prime is 2161253. The reversal of 2161237 is 7321612.

2161237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2161237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78 + ... + 2080.

It is an arithmetic number, because the mean of its divisors is an integer number (294588).

2^2161237 is an apocalyptic number.

It is an amenable number.

2161237 is a deficient number, since it is larger than the sum of its proper divisors (195467).

2161237 is a wasteful number, since it uses less digits than its factorization.

2161237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099.

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

The square root of 2161237 is about 1470.1146213816. The cubic root of 2161237 is about 129.2907529494.

Adding to 2161237 its reverse (7321612), we get a palindrome (9482849).

The spelling of 2161237 in words is "two million, one hundred sixty-one thousand, two hundred thirty-seven".