1281272 has 8 divisors (see below), whose sum is σ = 2402400. Its totient is φ = 640632.

The previous prime is 1281263. The next prime is 1281281. The reversal of 1281272 is 2721821.

It is an interprime number because it is at equal distance from previous prime (1281263) and next prime (1281281).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80072 + ... + 80087.

It is an arithmetic number, because the mean of its divisors is an integer number (300300).

2^1281272 is an apocalyptic number.

It is an amenable number.

1281272 is a deficient number, since it is larger than the sum of its proper divisors (1121128).

1281272 is a wasteful number, since it uses less digits than its factorization.

1281272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160165 (or 160161 counting only the distinct ones).

The product of its digits is 448, while the sum is 23.

The square root of 1281272 is about 1131.9328601998. The cubic root of 1281272 is about 108.6126587900.

The spelling of 1281272 in words is "one million, two hundred eighty-one thousand, two hundred seventy-two".