2291445 has 24 divisors (see below), whose sum is σ = 4278456. Its totient is φ = 1127808.

The previous prime is 2291437. The next prime is 2291459. The reversal of 2291445 is 5441922.

It can be written as a sum of positive squares in 4 ways, for example, as 191844 + 2099601 = 438^2 + 1449^2 .

It is not a de Polignac number, because 2291445 - 2³ = 2291437 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1374 + ... + 2543.

It is an arithmetic number, because the mean of its divisors is an integer number (178269).

2^2291445 is an apocalyptic number.

It is an amenable number.

2291445 is a deficient number, since it is larger than the sum of its proper divisors (1987011).

2291445 is a wasteful number, since it uses less digits than its factorization.

2291445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3941 (or 3938 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2291445 is about 1513.7519611878. The cubic root of 2291445 is about 131.8367472140.

The spelling of 2291445 in words is "two million, two hundred ninety-one thousand, four hundred forty-five".