1272737 has 4 divisors (see below), whose sum is σ = 1285956. Its totient is φ = 1259520.

The previous prime is 1272679. The next prime is 1272749. The reversal of 1272737 is 7372721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 358801 + 913936 = 599^2 + 956^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272737 - 2⁶ = 1272673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272937) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 6464 + ... + 6657.

It is an arithmetic number, because the mean of its divisors is an integer number (321489).

2^1272737 is an apocalyptic number.

It is an amenable number.

1272737 is a deficient number, since it is larger than the sum of its proper divisors (13219).

1272737 is an equidigital number, since it uses as much as digits as its factorization.

1272737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13218.

The product of its digits is 4116, while the sum is 29.

The square root of 1272737 is about 1128.1564607802. The cubic root of 1272737 is about 108.3709523527.

Subtracting from 1272737 its product of digits (4116), we obtain a palindrome (1268621).

The spelling of 1272737 in words is "one million, two hundred seventy-two thousand, seven hundred thirty-seven".