265285903 has 2 divisors, whose sum is σ = 265285904. Its totient is φ = 265285902.

The previous prime is 265285843. The next prime is 265285973. The reversal of 265285903 is 309582562.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265285903 is a prime.

It is a super-2 number, since 2×265285903² = 140753220661050818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265285973) 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, 132642951 + 132642952.

It is an arithmetic number, because the mean of its divisors is an integer number (132642952).

Almost surely, 2^265285903 is an apocalyptic number.

265285903 is a deficient number, since it is larger than the sum of its proper divisors (1).

265285903 is an equidigital number, since it uses as much as digits as its factorization.

265285903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 265285903 is about 16287.5996696874. The cubic root of 265285903 is about 642.5467395734.

The spelling of 265285903 in words is "two hundred sixty-five million, two hundred eighty-five thousand, nine hundred three".