2806245 has 60 divisors (see below), whose sum is σ = 5580036. Its totient is φ = 1347840.

The previous prime is 2806231. The next prime is 2806247. The reversal of 2806245 is 5426082.

It can be written as a sum of positive squares in 6 ways, for example, as 1285956 + 1520289 = 1134^2 + 1233^2 .

It is not a de Polignac number, because 2806245 - 2⁸ = 2805989 is a prime.

It is a super-2 number, since 2×2806245² = 15750022000050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2806247) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 68425 + ... + 68465.

2^2806245 is an apocalyptic number.

It is an amenable number.

2806245 is a deficient number, since it is larger than the sum of its proper divisors (2773791).

2806245 is a wasteful number, since it uses less digits than its factorization.

2806245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 62 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 2806245 is about 1675.1850644033. The cubic root of 2806245 is about 141.0506834543.

The spelling of 2806245 in words is "two million, eight hundred six thousand, two hundred forty-five".