1280772 has 60 divisors (see below), whose sum is σ = 3455760. Its totient is φ = 413424.

The previous prime is 1280767. The next prime is 1280789. The reversal of 1280772 is 2770821.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19083 + ... + 19149.

It is an arithmetic number, because the mean of its divisors is an integer number (57596).

2^1280772 is an apocalyptic number.

1280772 is a gapful number since it is divisible by the number (12) 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 1280772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1727880).

1280772 is an abundant number, since it is smaller than the sum of its proper divisors (2174988).

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

1280772 is a wasteful number, since it uses less digits than its factorization.

1280772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 1280772 is about 1131.7119774925. The cubic root of 1280772 is about 108.5985287185.

The spelling of 1280772 in words is "one million, two hundred eighty thousand, seven hundred seventy-two".