261126244 has 6 divisors (see below), whose sum is σ = 456970934. Its totient is φ = 130563120.

The previous prime is 261126241. The next prime is 261126259. The reversal of 261126244 is 442621162.

It can be written as a sum of positive squares in only one way, i.e., 220166244 + 40960000 = 14838^2 + 6400^2 .

It is not an unprimeable number, because it can be changed into a prime (261126241) by changing a digit.

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 as a sum of consecutive naturals, namely, 32640777 + ... + 32640784.

Almost surely, 2^261126244 is an apocalyptic number.

It is an amenable number.

261126244 is a deficient number, since it is larger than the sum of its proper divisors (195844690).

261126244 is a wasteful number, since it uses less digits than its factorization.

261126244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65281565 (or 65281563 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 261126244 is about 16159.4011027637. The cubic root of 261126244 is about 639.1706738519.

The spelling of 261126244 in words is "two hundred sixty-one million, one hundred twenty-six thousand, two hundred forty-four".