1278272 has 14 divisors (see below), whose sum is σ = 2536698. Its totient is φ = 639104.

The previous prime is 1278253. The next prime is 1278287. The reversal of 1278272 is 2728721.

It can be written as a sum of positive squares in only one way, i.e., 1032256 + 246016 = 1016^2 + 496^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9923 + ... + 10050.

2^1278272 is an apocalyptic number.

It is an amenable number.

1278272 is a deficient number, since it is larger than the sum of its proper divisors (1258426).

1278272 is an equidigital number, since it uses as much as digits as its factorization.

1278272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19985 (or 19975 counting only the distinct ones).

The product of its digits is 3136, while the sum is 29.

The square root of 1278272 is about 1130.6069166603. The cubic root of 1278272 is about 108.5278231434.

The spelling of 1278272 in words is "one million, two hundred seventy-eight thousand, two hundred seventy-two".