1285776 has 30 divisors (see below), whose sum is σ = 3598790. Its totient is φ = 428544.

The previous prime is 1285763. The next prime is 1285777. The reversal of 1285776 is 6775821.

It can be written as a sum of positive squares in only one way, i.e., 767376 + 518400 = 876^2 + 720^2 .

It is a super-4 number, since 4×1285776⁴ (a number of 26 digits) contains 4444 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1285776.

It is not an unprimeable number, because it can be changed into a prime (1285777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4321 + ... + 4608.

2^1285776 is an apocalyptic number.

1285776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1285776 is an abundant number, since it is smaller than the sum of its proper divisors (2313014).

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

1285776 is a wasteful number, since it uses less digits than its factorization.

1285776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8943 (or 8934 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 1285776 is about 1133.9206321432. The cubic root of 1285776 is about 108.7397770810.

The spelling of 1285776 in words is "one million, two hundred eighty-five thousand, seven hundred seventy-six".