1280164 has 6 divisors (see below), whose sum is σ = 2240294. Its totient is φ = 640080.

The previous prime is 1280161. The next prime is 1280173. The reversal of 1280164 is 4610821.

It can be written as a sum of positive squares in only one way, i.e., 705600 + 574564 = 840^2 + 758^2 .

It is not an unprimeable number, because it can be changed into a prime (1280161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160017 + ... + 160024.

2^1280164 is an apocalyptic number.

It is an amenable number.

1280164 is a deficient number, since it is larger than the sum of its proper divisors (960130).

1280164 is a wasteful number, since it uses less digits than its factorization.

1280164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320045 (or 320043 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1280164 is about 1131.4433260221. The cubic root of 1280164 is about 108.5813415959.

Adding to 1280164 its reverse (4610821), we get a palindrome (5890985).

It can be divided in two parts, 1280 and 164, that added together give a square (1444 = 38²).

The spelling of 1280164 in words is "one million, two hundred eighty thousand, one hundred sixty-four".