2261649 has 8 divisors (see below), whose sum is σ = 3247552. Its totient is φ = 1391760.

The previous prime is 2261639. The next prime is 2261653. The reversal of 2261649 is 9461622.

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

It is not a de Polignac number, because 2261649 - 2⁵ = 2261617 is a prime.

It is a Duffinian number.

2261649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2261639) 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, 28957 + ... + 29034.

It is an arithmetic number, because the mean of its divisors is an integer number (405944).

2^2261649 is an apocalyptic number.

It is an amenable number.

2261649 is a deficient number, since it is larger than the sum of its proper divisors (985903).

2261649 is a wasteful number, since it uses less digits than its factorization.

2261649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58007.

The product of its digits is 5184, while the sum is 30.

The square root of 2261649 is about 1503.8779870721. The cubic root of 2261649 is about 131.2628214232.

The spelling of 2261649 in words is "two million, two hundred sixty-one thousand, six hundred forty-nine".