2505697 has 4 divisors (see below), whose sum is σ = 2546836. Its totient is φ = 2464560.

The previous prime is 2505691. The next prime is 2505707. The reversal of 2505697 is 7965052.

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 1157776 + 1347921 = 1076^2 + 1161^2 .

It is a cyclic number.

It is not a de Polignac number, because 2505697 - 2¹⁵ = 2472929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2505691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20478 + ... + 20599.

It is an arithmetic number, because the mean of its divisors is an integer number (636709).

2^2505697 is an apocalyptic number.

It is an amenable number.

2505697 is a deficient number, since it is larger than the sum of its proper divisors (41139).

2505697 is an equidigital number, since it uses as much as digits as its factorization.

2505697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41138.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 2505697 is about 1582.9393544921. The cubic root of 2505697 is about 135.8238961999.

The spelling of 2505697 in words is "two million, five hundred five thousand, six hundred ninety-seven".