1260265995 has 24 divisors (see below), whose sum is σ = 2237743872. Its totient is φ = 655747200.

The previous prime is 1260265949. The next prime is 1260265999. The reversal of 1260265995 is 5995620621.

It is a happy number.

It is not a de Polignac number, because 1260265995 - 2¹¹ = 1260263947 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1260265995.

It is not an unprimeable number, because it can be changed into a prime (1260265999) 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 in 23 ways as a sum of consecutive naturals, for example, 339691 + ... + 343380.

It is an arithmetic number, because the mean of its divisors is an integer number (93239328).

Almost surely, 2^1260265995 is an apocalyptic number.

1260265995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1260265995 is a deficient number, since it is larger than the sum of its proper divisors (977477877).

1260265995 is a wasteful number, since it uses less digits than its factorization.

1260265995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683123 (or 683120 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 1260265995 is about 35500.2252809753. The cubic root of 1260265995 is about 1080.1582972702.

The spelling of 1260265995 in words is "one billion, two hundred sixty million, two hundred sixty-five thousand, nine hundred ninety-five".