261135154 has 8 divisors (see below), whose sum is σ = 447660288. Its totient is φ = 111915060.

The previous prime is 261135151. The next prime is 261135157. The reversal of 261135154 is 451531162.

261135154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (261135151) and next prime (261135157).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (261135151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9326242 + ... + 9326269.

It is an arithmetic number, because the mean of its divisors is an integer number (55957536).

Almost surely, 2^261135154 is an apocalyptic number.

261135154 is a deficient number, since it is larger than the sum of its proper divisors (186525134).

261135154 is a wasteful number, since it uses less digits than its factorization.

261135154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18652520.

The product of its digits is 3600, while the sum is 28.

The square root of 261135154 is about 16159.6767913223. The cubic root of 261135154 is about 639.1779435743.

The spelling of 261135154 in words is "two hundred sixty-one million, one hundred thirty-five thousand, one hundred fifty-four".