2991825 has 18 divisors (see below), whose sum is σ = 5359094. Its totient is φ = 1595520.

The previous prime is 2991803. The next prime is 2991853. The reversal of 2991825 is 5281992.

It can be written as a sum of positive squares in 3 ways, for example, as 36864 + 2954961 = 192^2 + 1719^2 .

It is not a de Polignac number, because 2991825 - 2⁶ = 2991761 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2991825.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6424 + ... + 6873.

2^2991825 is an apocalyptic number.

2991825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2991825 is a deficient number, since it is larger than the sum of its proper divisors (2367269).

2991825 is a wasteful number, since it uses less digits than its factorization.

2991825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13313 (or 13305 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 2991825 is about 1729.6892784544. The cubic root of 2991825 is about 144.0938335187.

The spelling of 2991825 in words is "two million, nine hundred ninety-one thousand, eight hundred twenty-five".