1281548016 has 120 divisors (see below), whose sum is σ = 4123173600. Its totient is φ = 363990528.

The previous prime is 1281547951. The next prime is 1281548041. The reversal of 1281548016 is 6108451821.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 6.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 170710 + ... + 178058.

It is an arithmetic number, because the mean of its divisors is an integer number (34359780).

Almost surely, 2^1281548016 is an apocalyptic number.

1281548016 is a gapful number since it is divisible by the number (16) 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 1281548016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2061586800).

1281548016 is an abundant number, since it is smaller than the sum of its proper divisors (2841625584).

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

1281548016 is a wasteful number, since it uses less digits than its factorization.

1281548016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7543 (or 7534 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 1281548016 is about 35798.7152842110. The cubic root of 1281548016 is about 1086.2045746697.

Adding to 1281548016 its reverse (6108451821), we get a palindrome (7389999837).

The spelling of 1281548016 in words is "one billion, two hundred eighty-one million, five hundred forty-eight thousand, sixteen".