2278825 has 6 divisors (see below), whose sum is σ = 2825774. Its totient is φ = 1823040.

The previous prime is 2278823. The next prime is 2278831. The reversal of 2278825 is 5288722.

It can be written as a sum of positive squares in 3 ways, for example, as 4761 + 2274064 = 69^2 + 1508^2 .

It is not a de Polignac number, because 2278825 - 2¹ = 2278823 is a prime.

It is a Duffinian number.

2278825 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2278823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45552 + ... + 45601.

2^2278825 is an apocalyptic number.

2278825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2278825 is a deficient number, since it is larger than the sum of its proper divisors (546949).

2278825 is an equidigital number, since it uses as much as digits as its factorization.

2278825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91163 (or 91158 counting only the distinct ones).

The product of its digits is 17920, while the sum is 34.

The square root of 2278825 is about 1509.5777555330. The cubic root of 2278825 is about 131.5942737936.

The spelling of 2278825 in words is "two million, two hundred seventy-eight thousand, eight hundred twenty-five".