2261749 has 8 divisors (see below), whose sum is σ = 2612288. Its totient is φ = 1918080.

The previous prime is 2261737. The next prime is 2261771. The reversal of 2261749 is 9471622.

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 2261749 - 2⁵ = 2261717 is a prime.

2261749 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2261749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 987 + ... + 2344.

It is an arithmetic number, because the mean of its divisors is an integer number (326536).

2^2261749 is an apocalyptic number.

It is an amenable number.

2261749 is a deficient number, since it is larger than the sum of its proper divisors (350539).

2261749 is an equidigital number, since it uses as much as digits as its factorization.

2261749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3435.

The product of its digits is 6048, while the sum is 31.

The square root of 2261749 is about 1503.9112340827. The cubic root of 2261749 is about 131.2647560129.

The spelling of 2261749 in words is "two million, two hundred sixty-one thousand, seven hundred forty-nine".