261004133 has 8 divisors (see below), whose sum is σ = 282766848. Its totient is φ = 239482224.

The previous prime is 261004103. The next prime is 261004151. The reversal of 261004133 is 331400162.

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

It is a cyclic number.

It is not a de Polignac number, because 261004133 - 2⁸ = 261003877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261004103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57941 + ... + 62282.

It is an arithmetic number, because the mean of its divisors is an integer number (35345856).

Almost surely, 2^261004133 is an apocalyptic number.

It is an amenable number.

261004133 is a deficient number, since it is larger than the sum of its proper divisors (21762715).

261004133 is a wasteful number, since it uses less digits than its factorization.

261004133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120403.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 261004133 is about 16155.6223340359. The cubic root of 261004133 is about 639.0710260873.

Adding to 261004133 its reverse (331400162), we get a palindrome (592404295).

The spelling of 261004133 in words is "two hundred sixty-one million, four thousand, one hundred thirty-three".