261042150 has 96 divisors (see below), whose sum is σ = 665100288. Its totient is φ = 67737600.

The previous prime is 261042101. The next prime is 261042161. The reversal of 261042150 is 51240162.

261042150 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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1352454 + ... + 1352646.

It is an arithmetic number, because the mean of its divisors is an integer number (6928128).

Almost surely, 2^261042150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261042150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332550144).

261042150 is an abundant number, since it is smaller than the sum of its proper divisors (404058138).

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

261042150 is a wasteful number, since it uses less digits than its factorization.

261042150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 261042150 is about 16156.7988784908. The cubic root of 261042150 is about 639.1020529059.

The spelling of 261042150 in words is "two hundred sixty-one million, forty-two thousand, one hundred fifty".