261506134 has 16 divisors (see below), whose sum is σ = 408961872. Its totient is φ = 125300448.

The previous prime is 261506129. The next prime is 261506183. The reversal of 261506134 is 431605162.

261506134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24129 + ... + 33244.

It is an arithmetic number, because the mean of its divisors is an integer number (25560117).

Almost surely, 2^261506134 is an apocalyptic number.

261506134 is a deficient number, since it is larger than the sum of its proper divisors (147455738).

261506134 is a wasteful number, since it uses less digits than its factorization.

261506134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57471.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 261506134 is about 16171.1512886374. The cubic root of 261506134 is about 639.4804817168.

The spelling of 261506134 in words is "two hundred sixty-one million, five hundred six thousand, one hundred thirty-four".