261340142 has 24 divisors (see below), whose sum is σ = 451785648. Its totient is φ = 111064320.

The previous prime is 261340127. The next prime is 261340147. The reversal of 261340142 is 241043162.

261340142 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 (261340147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 840167 + ... + 840477.

It is an arithmetic number, because the mean of its divisors is an integer number (18824402).

Almost surely, 2^261340142 is an apocalyptic number.

261340142 is a deficient number, since it is larger than the sum of its proper divisors (190445506).

261340142 is an equidigital number, since it uses as much as digits as its factorization.

261340142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 261340142 is about 16166.0181244486. The cubic root of 261340142 is about 639.3451488665.

The spelling of 261340142 in words is "two hundred sixty-one million, three hundred forty thousand, one hundred forty-two".