1272778 has 8 divisors (see below), whose sum is σ = 2056068. Its totient is φ = 587424.

The previous prime is 1272749. The next prime is 1272811. The reversal of 1272778 is 8772721.

It can be written as a sum of positive squares in 2 ways, for example, as 1216609 + 56169 = 1103^2 + 237^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24451 + ... + 24502.

2^1272778 is an apocalyptic number.

1272778 is a deficient number, since it is larger than the sum of its proper divisors (783290).

1272778 is a wasteful number, since it uses less digits than its factorization.

1272778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48968.

The product of its digits is 10976, while the sum is 34.

The square root of 1272778 is about 1128.1746318722. The cubic root of 1272778 is about 108.3721160289.

The spelling of 1272778 in words is "one million, two hundred seventy-two thousand, seven hundred seventy-eight".