2891225 has 12 divisors (see below), whose sum is σ = 3621420. Its totient is φ = 2289600.

The previous prime is 2891219. The next prime is 2891233. The reversal of 2891225 is 5221982.

It can be written as a sum of positive squares in 6 ways, for example, as 4624 + 2886601 = 68^2 + 1699^2 .

It is not a de Polignac number, because 2891225 - 2¹⁴ = 2874841 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2195 + ... + 3255.

It is an arithmetic number, because the mean of its divisors is an integer number (301785).

2^2891225 is an apocalyptic number.

2891225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2891225 is a deficient number, since it is larger than the sum of its proper divisors (730195).

2891225 is a wasteful number, since it uses less digits than its factorization.

2891225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180 (or 1175 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 2891225 is about 1700.3602559458. The cubic root of 2891225 is about 142.4603357340.

It can be divided in two parts, 289 and 1225, that multiplied together give a square (354025 = 595²).

The spelling of 2891225 in words is "two million, eight hundred ninety-one thousand, two hundred twenty-five".