261164142 has 32 divisors (see below), whose sum is σ = 583944960. Its totient is φ = 86517720.

The previous prime is 261164129. The next prime is 261164153. The reversal of 261164142 is 241461162.

261164142 is a `hidden beast` number, since 2 + 6 + 11 + 641 + 4 + 2 = 666.

261164142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6034 + ... + 23637.

It is an arithmetic number, because the mean of its divisors is an integer number (18248280).

Almost surely, 2^261164142 is an apocalyptic number.

261164142 is an abundant number, since it is smaller than the sum of its proper divisors (322780818).

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

261164142 is a wasteful number, since it uses less digits than its factorization.

261164142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29845 (or 29839 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 261164142 is about 16160.5736903119. The cubic root of 261164142 is about 639.2015939132.

The spelling of 261164142 in words is "two hundred sixty-one million, one hundred sixty-four thousand, one hundred forty-two".