2261578 has 16 divisors (see below), whose sum is σ = 3919104. Its totient is φ = 967360.

The previous prime is 2261573. The next prime is 2261587. The reversal of 2261578 is 8751622.

It is a super-2 number, since 2×2261578² = 10229470100168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2261573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2650 + ... + 3397.

It is an arithmetic number, because the mean of its divisors is an integer number (244944).

2^2261578 is an apocalyptic number.

2261578 is a deficient number, since it is larger than the sum of its proper divisors (1657526).

2261578 is a wasteful number, since it uses less digits than its factorization.

2261578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6077.

The product of its digits is 6720, while the sum is 31.

The square root of 2261578 is about 1503.8543812484. The cubic root of 2261578 is about 131.2614478299.

The spelling of 2261578 in words is "two million, two hundred sixty-one thousand, five hundred seventy-eight".