261042244 has 12 divisors (see below), whose sum is σ = 467966268. Its totient is φ = 127337600.

The previous prime is 261042193. The next prime is 261042263. The reversal of 261042244 is 442240162.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 151044100 + 109998144 = 12290^2 + 10488^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795697 + ... + 796024.

It is an arithmetic number, because the mean of its divisors is an integer number (38997189).

Almost surely, 2^261042244 is an apocalyptic number.

It is an amenable number.

261042244 is a deficient number, since it is larger than the sum of its proper divisors (206924024).

261042244 is a wasteful number, since it uses less digits than its factorization.

261042244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591766 (or 1591764 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 261042244 is about 16156.8017874826. The cubic root of 261042244 is about 639.1021296184.

The spelling of 261042244 in words is "two hundred sixty-one million, forty-two thousand, two hundred forty-four".