261162403 has 2 divisors, whose sum is σ = 261162404. Its totient is φ = 261162402.

The previous prime is 261162373. The next prime is 261162427. The reversal of 261162403 is 304261162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261162403 - 2⁹ = 261161891 is a prime.

It is not a weakly prime, because it can be changed into another prime (261162463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130581201 + 130581202.

It is an arithmetic number, because the mean of its divisors is an integer number (130581202).

Almost surely, 2^261162403 is an apocalyptic number.

261162403 is a deficient number, since it is larger than the sum of its proper divisors (1).

261162403 is an equidigital number, since it uses as much as digits as its factorization.

261162403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 261162403 is about 16160.5198864393. The cubic root of 261162403 is about 639.2001751707.

It can be divided in two parts, 261162 and 403, that multiplied together give a triangular number (105248286 = T₁₄₅₀₈).

The spelling of 261162403 in words is "two hundred sixty-one million, one hundred sixty-two thousand, four hundred three".