1265501225 has 12 divisors (see below), whose sum is σ = 1569680784. Its totient is φ = 1012104720.

The previous prime is 1265501219. The next prime is 1265501257. The reversal of 1265501225 is 5221055621.

It is not a de Polignac number, because 1265501225 - 2⁸ = 1265500969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 128942 + ... + 138408.

It is an arithmetic number, because the mean of its divisors is an integer number (130806732).

Almost surely, 2^1265501225 is an apocalyptic number.

It is an amenable number.

1265501225 is a deficient number, since it is larger than the sum of its proper divisors (304179559).

1265501225 is an equidigital number, since it uses as much as digits as its factorization.

1265501225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14824 (or 14819 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 1265501225 is about 35573.8840302827. The cubic root of 1265501225 is about 1081.6519144693.

Adding to 1265501225 its reverse (5221055621), we get a palindrome (6486556846).

The spelling of 1265501225 in words is "one billion, two hundred sixty-five million, five hundred one thousand, two hundred twenty-five".