261005433 has 16 divisors (see below), whose sum is σ = 375350976. Its totient is φ = 160372800.

The previous prime is 261005389. The next prime is 261005453. The reversal of 261005433 is 334500162.

It is a happy number.

It is not a de Polignac number, because 261005433 - 2¹⁶ = 260939897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261005453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22566 + ... + 32112.

It is an arithmetic number, because the mean of its divisors is an integer number (23459436).

Almost surely, 2^261005433 is an apocalyptic number.

It is an amenable number.

261005433 is a deficient number, since it is larger than the sum of its proper divisors (114345543).

261005433 is a wasteful number, since it uses less digits than its factorization.

261005433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10264.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 261005433 is about 16155.6625676572. The cubic root of 261005433 is about 639.0720871062.

Adding to 261005433 its reverse (334500162), we get a palindrome (595505595).

The spelling of 261005433 in words is "two hundred sixty-one million, five thousand, four hundred thirty-three".