1281858048 has 120 divisors (see below), whose sum is σ = 3836921088. Its totient is φ = 427244544.

The previous prime is 1281858041. The next prime is 1281858049. The reversal of 1281858048 is 8408581821.

1281858048 is a `hidden beast` number, since 1 + 28 + 1 + 8 + 580 + 48 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1281857994 and 1281858012.

It is not an unprimeable number, because it can be changed into a prime (1281858041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119265 + ... + 129567.

Almost surely, 2^1281858048 is an apocalyptic number.

1281858048 is a gapful number since it is divisible by the number (18) 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 1281858048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1918460544).

1281858048 is an abundant number, since it is smaller than the sum of its proper divisors (2555063040).

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

1281858048 is an frugal number, since it uses more digits than its factorization.

1281858048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10336 (or 10308 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 45.

The square root of 1281858048 is about 35803.0452336111. The cubic root of 1281858048 is about 1086.2921591171.

It can be divided in two parts, 1281 and 858048, that added together give a square (859329 = 927²).

The spelling of 1281858048 in words is "one billion, two hundred eighty-one million, eight hundred fifty-eight thousand, forty-eight".