1296112240 has 40 divisors (see below), whose sum is σ = 3015030240. Its totient is φ = 518174976.

The previous prime is 1296112211. The next prime is 1296112241. The reversal of 1296112240 is 422116921.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1296112199 and 1296112208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296112241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233821 + ... + 239299.

It is an arithmetic number, because the mean of its divisors is an integer number (75375756).

Almost surely, 2^1296112240 is an apocalyptic number.

1296112240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1296112240 is an abundant number, since it is smaller than the sum of its proper divisors (1718918000).

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

1296112240 is a wasteful number, since it uses less digits than its factorization.

1296112240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8449 (or 8443 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1296112240 is about 36001.5588551385. The cubic root of 1296112240 is about 1090.3038291141.

The spelling of 1296112240 in words is "one billion, two hundred ninety-six million, one hundred twelve thousand, two hundred forty".