2261945 has 8 divisors (see below), whose sum is σ = 3102144. Its totient is φ = 1551024.

The previous prime is 2261933. The next prime is 2261993. The reversal of 2261945 is 5491622.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2261945 - 2⁸ = 2261689 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2 + 2³ + 6⁶ + 1 + 9 + 4⁹ + 5⁹ .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32279 + ... + 32348.

It is an arithmetic number, because the mean of its divisors is an integer number (387768).

2^2261945 is an apocalyptic number.

It is an amenable number.

2261945 is a deficient number, since it is larger than the sum of its proper divisors (840199).

2261945 is an equidigital number, since it uses as much as digits as its factorization.

2261945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64639.

The product of its digits is 4320, while the sum is 29.

The square root of 2261945 is about 1503.9763960914. The cubic root of 2261945 is about 131.2685476434.

The spelling of 2261945 in words is "two million, two hundred sixty-one thousand, nine hundred forty-five".