2161325 has 6 divisors (see below), whose sum is σ = 2680074. Its totient is φ = 1729040.

The previous prime is 2161319. The next prime is 2161331. The reversal of 2161325 is 5231612.

It is an interprime number because it is at equal distance from previous prime (2161319) and next prime (2161331).

It can be written as a sum of positive squares in 3 ways, for example, as 3364 + 2157961 = 58^2 + 1469^2 .

It is not a de Polignac number, because 2161325 - 2¹² = 2157229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2161297 and 2161306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43202 + ... + 43251.

It is an arithmetic number, because the mean of its divisors is an integer number (446679).

2^2161325 is an apocalyptic number.

2161325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2161325 is a deficient number, since it is larger than the sum of its proper divisors (518749).

2161325 is an equidigital number, since it uses as much as digits as its factorization.

2161325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86463 (or 86458 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 2161325 is about 1470.1445507160. The cubic root of 2161325 is about 129.2925077210.

Adding to 2161325 its reverse (5231612), we get a palindrome (7392937).

The spelling of 2161325 in words is "two million, one hundred sixty-one thousand, three hundred twenty-five".