1272637 has 4 divisors (see below), whose sum is σ = 1347516. Its totient is φ = 1197760.

The previous prime is 1272631. The next prime is 1272641. The reversal of 1272637 is 7362721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7362721 = 79 ⋅93199.

It can be written as a sum of positive squares in 2 ways, for example, as 1052676 + 219961 = 1026^2 + 469^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272637 - 2³ = 1272629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37414 + ... + 37447.

It is an arithmetic number, because the mean of its divisors is an integer number (336879).

2^1272637 is an apocalyptic number.

1272637 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1272637 is a deficient number, since it is larger than the sum of its proper divisors (74879).

1272637 is an equidigital number, since it uses as much as digits as its factorization.

1272637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74878.

The product of its digits is 3528, while the sum is 28.

The square root of 1272637 is about 1128.1121398159. The cubic root of 1272637 is about 108.3681140132.

The spelling of 1272637 in words is "one million, two hundred seventy-two thousand, six hundred thirty-seven".