1275440120 has 32 divisors (see below), whose sum is σ = 2898162720. Its totient is φ = 505123200.

The previous prime is 1275440093. The next prime is 1275440141. The reversal of 1275440120 is 210445721.

It is a super-2 number, since 2×1275440120² = 3253494999411228800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1275440120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153812 + ... + 161891.

It is an arithmetic number, because the mean of its divisors is an integer number (90567585).

Almost surely, 2^1275440120 is an apocalyptic number.

1275440120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275440120 is an abundant number, since it is smaller than the sum of its proper divisors (1622722600).

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

1275440120 is a wasteful number, since it uses less digits than its factorization.

1275440120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315815 (or 315811 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 1275440120 is about 35713.3045236646. The cubic root of 1275440120 is about 1084.4761981424.

Adding to 1275440120 its reverse (210445721), we get a palindrome (1485885841).

The spelling of 1275440120 in words is "one billion, two hundred seventy-five million, four hundred forty thousand, one hundred twenty".