1272842 has 4 divisors (see below), whose sum is σ = 1909266. Its totient is φ = 636420.

The previous prime is 1272833. The next prime is 1272847. The reversal of 1272842 is 2482721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2482721 = 107 ⋅23203.

It can be written as a sum of positive squares in only one way, i.e., 811801 + 461041 = 901^2 + 679^2 .

It is not an unprimeable number, because it can be changed into a prime (1272847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318209 + ... + 318212.

2^1272842 is an apocalyptic number.

1272842 is a deficient number, since it is larger than the sum of its proper divisors (636424).

1272842 is an equidigital number, since it uses as much as digits as its factorization.

1272842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636423.

The product of its digits is 1792, while the sum is 26.

The square root of 1272842 is about 1128.2029959187. The cubic root of 1272842 is about 108.3739324491.

The spelling of 1272842 in words is "one million, two hundred seventy-two thousand, eight hundred forty-two".