2513845 has 4 divisors (see below), whose sum is σ = 3016620. Its totient is φ = 2011072.

The previous prime is 2513839. The next prime is 2513881. The reversal of 2513845 is 5483152.

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 1656369 + 857476 = 1287^2 + 926^2 .

It is a cyclic number.

It is not a de Polignac number, because 2513845 - 2⁹ = 2513333 is a prime.

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, 251380 + ... + 251389.

It is an arithmetic number, because the mean of its divisors is an integer number (754155).

2^2513845 is an apocalyptic number.

It is an amenable number.

2513845 is a deficient number, since it is larger than the sum of its proper divisors (502775).

2513845 is an equidigital number, since it uses as much as digits as its factorization.

2513845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502774.

The product of its digits is 4800, while the sum is 28.

The square root of 2513845 is about 1585.5109586502. The cubic root of 2513845 is about 135.9709604953.

Adding to 2513845 its reverse (5483152), we get a palindrome (7996997).

It can be divided in two parts, 251 and 3845, that added together give a 12-th power (4096 = 2¹²).

The spelling of 2513845 in words is "two million, five hundred thirteen thousand, eight hundred forty-five".