265126403 has 2 divisors, whose sum is σ = 265126404. Its totient is φ = 265126402.

The previous prime is 265126357. The next prime is 265126409. The reversal of 265126403 is 304621562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265126403 - 2¹⁰ = 265125379 is a prime.

It is not a weakly prime, because it can be changed into another prime (265126409) 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, 132563201 + 132563202.

It is an arithmetic number, because the mean of its divisors is an integer number (132563202).

Almost surely, 2^265126403 is an apocalyptic number.

265126403 is a deficient number, since it is larger than the sum of its proper divisors (1).

265126403 is an equidigital number, since it uses as much as digits as its factorization.

265126403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 265126403 is about 16282.7025705194. The cubic root of 265126403 is about 642.4179392236.

Adding to 265126403 its reverse (304621562), we get a palindrome (569747965).

The spelling of 265126403 in words is "two hundred sixty-five million, one hundred twenty-six thousand, four hundred three".