2815397 has 4 divisors (see below), whose sum is σ = 3031980. Its totient is φ = 2598816.

The previous prime is 2815369. The next prime is 2815399. The reversal of 2815397 is 7935182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 982081 + 1833316 = 991^2 + 1354^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2815397 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2815399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108272 + ... + 108297.

It is an arithmetic number, because the mean of its divisors is an integer number (757995).

2^2815397 is an apocalyptic number.

It is an amenable number.

2815397 is a deficient number, since it is larger than the sum of its proper divisors (216583).

2815397 is a wasteful number, since it uses less digits than its factorization.

2815397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216582.

The product of its digits is 15120, while the sum is 35.

The square root of 2815397 is about 1677.9144793463. The cubic root of 2815397 is about 141.2038531478.

The spelling of 2815397 in words is "two million, eight hundred fifteen thousand, three hundred ninety-seven".