2261009 has 2 divisors, whose sum is σ = 2261010. Its totient is φ = 2261008.

The previous prime is 2260967. The next prime is 2261023. The reversal of 2261009 is 9001622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1500625 + 760384 = 1225^2 + 872^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261009 - 2¹² = 2256913 is a prime.

It is a super-2 number, since 2×2261009² = 10224323396162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2261099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130504 + 1130505.

It is an arithmetic number, because the mean of its divisors is an integer number (1130505).

2^2261009 is an apocalyptic number.

It is an amenable number.

2261009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261009 is an equidigital number, since it uses as much as digits as its factorization.

2261009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2261009 is about 1503.6651887970. The cubic root of 2261009 is about 131.2504386985.

The spelling of 2261009 in words is "two million, two hundred sixty-one thousand, nine".