1275298440 has 256 divisors, whose sum is σ = 4281016320. Its totient is φ = 301916160.

The previous prime is 1275298397. The next prime is 1275298447. The reversal of 1275298440 is 448925721.

It is a super-2 number, since 2×1275298440² = 3252772222132867200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1275298392 and 1275298401.

It is not an unprimeable number, because it can be changed into a prime (1275298447) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8122842 + ... + 8122998.

It is an arithmetic number, because the mean of its divisors is an integer number (16722720).

Almost surely, 2^1275298440 is an apocalyptic number.

1275298440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1275298440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2140508160).

1275298440 is an abundant number, since it is smaller than the sum of its proper divisors (3005717880).

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

1275298440 is a wasteful number, since it uses less digits than its factorization.

1275298440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 1275298440 is about 35711.3208940806. The cubic root of 1275298440 is about 1084.4360409515.

The spelling of 1275298440 in words is "one billion, two hundred seventy-five million, two hundred ninety-eight thousand, four hundred forty".