261142612 has 48 divisors (see below), whose sum is σ = 504504000. Its totient is φ = 117815040.

The previous prime is 261142603. The next prime is 261142613. The reversal of 261142612 is 216241162.

It is a happy number.

261142612 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261142613) 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 in 15 ways as a sum of consecutive naturals, for example, 133014 + ... + 134962.

It is an arithmetic number, because the mean of its divisors is an integer number (10510500).

Almost surely, 2^261142612 is an apocalyptic number.

It is an amenable number.

261142612 is a deficient number, since it is larger than the sum of its proper divisors (243361388).

261142612 is a wasteful number, since it uses less digits than its factorization.

261142612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056 (or 2054 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 261142612 is about 16159.9075492405. The cubic root of 261142612 is about 639.1840284741.

Adding to 261142612 its reverse (216241162), we get a palindrome (477383774).

The spelling of 261142612 in words is "two hundred sixty-one million, one hundred forty-two thousand, six hundred twelve".