2157325 has 6 divisors (see below), whose sum is σ = 2675114. Its totient is φ = 1725840.

The previous prime is 2157319. The next prime is 2157329. The reversal of 2157325 is 5237512.

It can be written as a sum of positive squares in 3 ways, for example, as 19881 + 2137444 = 141^2 + 1462^2 .

It is not a de Polignac number, because 2157325 - 2⁵ = 2157293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 86293 = 2157325 / (2 + 1 + 5 + 7 + 3 + 2 + 5).

It is a d-powerful number, because it can be written as 2¹⁰ + 1 + 5² + 7² + 3¹⁰ + 2²¹ + 5² .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2157325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157329) 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, 43122 + ... + 43171.

2^2157325 is an apocalyptic number.

2157325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2157325 is a deficient number, since it is larger than the sum of its proper divisors (517789).

2157325 is an equidigital number, since it uses as much as digits as its factorization.

2157325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86303 (or 86298 counting only the distinct ones).

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

The square root of 2157325 is about 1468.7835102560. The cubic root of 2157325 is about 129.2126972029.

The spelling of 2157325 in words is "two million, one hundred fifty-seven thousand, three hundred twenty-five".