261044141 has 2 divisors, whose sum is σ = 261044142. Its totient is φ = 261044140.

The previous prime is 261044107. The next prime is 261044153. The reversal of 261044141 is 141440162.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254562025 + 6482116 = 15955^2 + 2546^2 .

It is a cyclic number.

It is not a de Polignac number, because 261044141 - 2¹⁰ = 261043117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261044041) by changing a digit.

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 as a sum of consecutive naturals, namely, 130522070 + 130522071.

It is an arithmetic number, because the mean of its divisors is an integer number (130522071).

Almost surely, 2^261044141 is an apocalyptic number.

It is an amenable number.

261044141 is a deficient number, since it is larger than the sum of its proper divisors (1).

261044141 is an equidigital number, since it uses as much as digits as its factorization.

261044141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 261044141 is about 16156.8604933013. The cubic root of 261044141 is about 639.1036777379.

The spelling of 261044141 in words is "two hundred sixty-one million, forty-four thousand, one hundred forty-one".