261256244 has 12 divisors (see below), whose sum is σ = 472964100. Its totient is φ = 126123648.

The previous prime is 261256243. The next prime is 261256267. The reversal of 261256244 is 442652162.

261256244 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 219395344 + 41860900 = 14812^2 + 6470^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 261256244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261256243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1125989 + ... + 1126220.

It is an arithmetic number, because the mean of its divisors is an integer number (39413675).

Almost surely, 2^261256244 is an apocalyptic number.

It is an amenable number.

261256244 is a deficient number, since it is larger than the sum of its proper divisors (211707856).

261256244 is a wasteful number, since it uses less digits than its factorization.

261256244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252242 (or 2252240 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 261256244 is about 16163.4230285543. The cubic root of 261256244 is about 639.2767252407.

It can be divided in two parts, 261 and 256244, that multiplied together give a square (66879684 = 8178²).

The spelling of 261256244 in words is "two hundred sixty-one million, two hundred fifty-six thousand, two hundred forty-four".