261442112 has 14 divisors (see below), whose sum is σ = 518799318. Its totient is φ = 130721024.

The previous prime is 261442091. The next prime is 261442141. The reversal of 261442112 is 211244162.

It can be written as a sum of positive squares in only one way, i.e., 248882176 + 12559936 = 15776^2 + 3544^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2042453 + ... + 2042580.

Almost surely, 2^261442112 is an apocalyptic number.

It is an amenable number.

261442112 is a deficient number, since it is larger than the sum of its proper divisors (257357206).

261442112 is an equidigital number, since it uses as much as digits as its factorization.

261442112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4085045 (or 4085035 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 261442112 is about 16169.1716547262. The cubic root of 261442112 is about 639.4282915314.

Adding to 261442112 its reverse (211244162), we get a palindrome (472686274).

The spelling of 261442112 in words is "two hundred sixty-one million, four hundred forty-two thousand, one hundred twelve".