265403 has 2 divisors, whose sum is σ = 265404. Its totient is φ = 265402.

The previous prime is 265399. The next prime is 265417. The reversal of 265403 is 304562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265403 - 2² = 265399 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (265423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132701 + 132702.

It is an arithmetic number, because the mean of its divisors is an integer number (132702).

2²⁶⁵⁴⁰³ is an apocalyptic number.

265403 is a deficient number, since it is larger than the sum of its proper divisors (1).

265403 is an equidigital number, since it uses as much as digits as its factorization.

265403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 265403 is about 515.1727865484. The cubic root of 265403 is about 64.2641265551.

Adding to 265403 its reverse (304562), we get a palindrome (569965).

The spelling of 265403 in words is "two hundred sixty-five thousand, four hundred three".