2645245 has 4 divisors (see below), whose sum is σ = 3174300. Its totient is φ = 2116192.

The previous prime is 2645239. The next prime is 2645257. The reversal of 2645245 is 5425462.

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 894916 + 1750329 = 946^2 + 1323^2 .

It is a cyclic number.

It is not a de Polignac number, because 2645245 - 2⁵ = 2645213 is a prime.

It is a super-2 number, since 2×2645245² = 13994642220050, which contains 22 as substring.

2645245 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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, 264520 + ... + 264529.

It is an arithmetic number, because the mean of its divisors is an integer number (793575).

2^2645245 is an apocalyptic number.

It is an amenable number.

2645245 is a deficient number, since it is larger than the sum of its proper divisors (529055).

2645245 is an equidigital number, since it uses as much as digits as its factorization.

2645245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529054.

The product of its digits is 9600, while the sum is 28.

The square root of 2645245 is about 1626.4209172290. The cubic root of 2645245 is about 138.2999322594.

It can be divided in two parts, 2645 and 245, that multiplied together give a square (648025 = 805²).

The spelling of 2645245 in words is "two million, six hundred forty-five thousand, two hundred forty-five".