261142716 has 48 divisors (see below), whose sum is σ = 630282240. Its totient is φ = 84102720.

The previous prime is 261142711. The next prime is 261142727. The reversal of 261142716 is 617241162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261142711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41626 + ... + 47486.

It is an arithmetic number, because the mean of its divisors is an integer number (13130880).

Almost surely, 2^261142716 is an apocalyptic number.

It is an amenable number.

261142716 is an abundant number, since it is smaller than the sum of its proper divisors (369139524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261142716 is a wasteful number, since it uses less digits than its factorization.

261142716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5994 (or 5992 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 261142716 is about 16159.9107670804. The cubic root of 261142716 is about 639.1841133257.

Adding to 261142716 its reverse (617241162), we get a palindrome (878383878).

The spelling of 261142716 in words is "two hundred sixty-one million, one hundred forty-two thousand, seven hundred sixteen".