1265541023 has 2 divisors, whose sum is σ = 1265541024. Its totient is φ = 1265541022.

The previous prime is 1265541019. The next prime is 1265541071. The reversal of 1265541023 is 3201455621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1265541023 - 2² = 1265541019 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265531023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632770511 + 632770512.

It is an arithmetic number, because the mean of its divisors is an integer number (632770512).

Almost surely, 2^1265541023 is an apocalyptic number.

1265541023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265541023 is an equidigital number, since it uses as much as digits as its factorization.

1265541023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1265541023 is about 35574.4433969107. The cubic root of 1265541023 is about 1081.6632530943.

Adding to 1265541023 its reverse (3201455621), we get a palindrome (4466996644).

The spelling of 1265541023 in words is "one billion, two hundred sixty-five million, five hundred forty-one thousand, twenty-three".