1281374120 has 64 divisors (see below), whose sum is σ = 3129477120. Its totient is φ = 469373184.

The previous prime is 1281374069. The next prime is 1281374147. The reversal of 1281374120 is 214731821.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 56339 + ... + 75741.

It is an arithmetic number, because the mean of its divisors is an integer number (48898080).

Almost surely, 2^1281374120 is an apocalyptic number.

1281374120 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 1281374120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1564738560).

1281374120 is an abundant number, since it is smaller than the sum of its proper divisors (1848103000).

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

1281374120 is a wasteful number, since it uses less digits than its factorization.

1281374120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19554 (or 19550 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1281374120 is about 35796.2863995694. The cubic root of 1281374120 is about 1086.1554426376.

The spelling of 1281374120 in words is "one billion, two hundred eighty-one million, three hundred seventy-four thousand, one hundred twenty".