2261040 has 40 divisors (see below), whose sum is σ = 7009968. Its totient is φ = 602880.

The previous prime is 2261023. The next prime is 2261041. The reversal of 2261040 is 401622.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×2261040² = 10224603763200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (2261041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4471 + ... + 4950.

2^2261040 is an apocalyptic number.

2261040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2261040 is an abundant number, since it is smaller than the sum of its proper divisors (4748928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2261040 is a wasteful number, since it uses less digits than its factorization.

2261040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9437 (or 9431 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2261040 is about 1503.6754969075. The cubic root of 2261040 is about 131.2510385405.

Adding to 2261040 its reverse (401622), we get a palindrome (2662662).

The spelling of 2261040 in words is "two million, two hundred sixty-one thousand, forty".