261444242 has 8 divisors (see below), whose sum is σ = 392238732. Its totient is φ = 130698000.

The previous prime is 261444187. The next prime is 261444247. The reversal of 261444242 is 242444162.

261444242 is digitally balanced in base 2, because in such base 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 172160641 + 89283601 = 13121^2 + 9449^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (261444247) 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, 8492 + ... + 24392.

Almost surely, 2^261444242 is an apocalyptic number.

261444242 is a deficient number, since it is larger than the sum of its proper divisors (130794490).

261444242 is a wasteful number, since it uses less digits than its factorization.

261444242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24124.

The product of its digits is 12288, while the sum is 29.

The square root of 261444242 is about 16169.2375206749. The cubic root of 261444242 is about 639.4300280261.

The spelling of 261444242 in words is "two hundred sixty-one million, four hundred forty-four thousand, two hundred forty-two".