2261549 has 2 divisors, whose sum is σ = 2261550. Its totient is φ = 2261548.

The previous prime is 2261531. The next prime is 2261557. The reversal of 2261549 is 9451622.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1464100 + 797449 = 1210^2 + 893^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261549 - 2²⁰ = 1212973 is a prime.

It is a super-2 number, since 2×2261549² = 10229207758802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2261509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130774 + 1130775.

It is an arithmetic number, because the mean of its divisors is an integer number (1130775).

2^2261549 is an apocalyptic number.

It is an amenable number.

2261549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261549 is an equidigital number, since it uses as much as digits as its factorization.

2261549 is an evil number, because the sum of its binary digits is even.

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

The square root of 2261549 is about 1503.8447393265. The cubic root of 2261549 is about 131.2608867765.

The spelling of 2261549 in words is "two million, two hundred sixty-one thousand, five hundred forty-nine".