261004103 has 2 divisors, whose sum is σ = 261004104. Its totient is φ = 261004102.

The previous prime is 261004087. The next prime is 261004151. The reversal of 261004103 is 301400162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261004103 - 2⁴ = 261004087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261004153) 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 as a sum of consecutive naturals, namely, 130502051 + 130502052.

It is an arithmetic number, because the mean of its divisors is an integer number (130502052).

Almost surely, 2^261004103 is an apocalyptic number.

261004103 is a deficient number, since it is larger than the sum of its proper divisors (1).

261004103 is an equidigital number, since it uses as much as digits as its factorization.

261004103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 261004103 is about 16155.6214055665. The cubic root of 261004103 is about 639.0710016022.

Adding to 261004103 its reverse (301400162), we get a palindrome (562404265).

It can be divided in two parts, 26100 and 4103, that added together give a palindrome (30203).

The spelling of 261004103 in words is "two hundred sixty-one million, four thousand, one hundred three".