261134011 has 2 divisors, whose sum is σ = 261134012. Its totient is φ = 261134010.

The previous prime is 261133997. The next prime is 261134017. The reversal of 261134011 is 110431162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261134011 - 2¹⁷ = 261002939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261134011.

It is not a weakly prime, because it can be changed into another prime (261134017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130567005 + 130567006.

It is an arithmetic number, because the mean of its divisors is an integer number (130567006).

Almost surely, 2^261134011 is an apocalyptic number.

261134011 is a deficient number, since it is larger than the sum of its proper divisors (1).

261134011 is an equidigital number, since it uses as much as digits as its factorization.

261134011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 261134011 is about 16159.6414254772. The cubic root of 261134011 is about 639.1770110030.

Adding to 261134011 its reverse (110431162), we get a palindrome (371565173).

The spelling of 261134011 in words is "two hundred sixty-one million, one hundred thirty-four thousand, eleven".