1296260040 has 64 divisors (see below), whose sum is σ = 4014236160. Its totient is φ = 334517760.

The previous prime is 1296260039. The next prime is 1296260041. The reversal of 1296260040 is 400626921.

It is an interprime number because it is at equal distance from previous prime (1296260039) and next prime (1296260041).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1296260041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170509 + ... + 177948.

It is an arithmetic number, because the mean of its divisors is an integer number (62722440).

Almost surely, 2^1296260040 is an apocalyptic number.

1296260040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1296260040 is an abundant number, since it is smaller than the sum of its proper divisors (2717976120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1296260040 is a wasteful number, since it uses less digits than its factorization.

1296260040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348502 (or 348498 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1296260040 is about 36003.6114855163. The cubic root of 1296260040 is about 1090.3452711991.

Adding to 1296260040 its reverse (400626921), we get a palindrome (1696886961).

The spelling of 1296260040 in words is "one billion, two hundred ninety-six million, two hundred sixty thousand, forty".