1272649 has 8 divisors (see below), whose sum is σ = 1461888. Its totient is φ = 1085280.

The previous prime is 1272647. The next prime is 1272653. The reversal of 1272649 is 9462721.

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

It is not a de Polignac number, because 1272649 - 2¹ = 1272647 is a prime.

It is a Duffinian number.

1272649 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1272649.

It is not an unprimeable number, because it can be changed into a prime (1272641) 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 7 ways as a sum of consecutive naturals, for example, 1644 + ... + 2290.

It is an arithmetic number, because the mean of its divisors is an integer number (182736).

2^1272649 is an apocalyptic number.

It is an amenable number.

1272649 is a deficient number, since it is larger than the sum of its proper divisors (189239).

1272649 is an equidigital number, since it uses as much as digits as its factorization.

1272649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935.

The product of its digits is 6048, while the sum is 31.

The square root of 1272649 is about 1128.1174584235. The cubic root of 1272649 is about 108.3684546218.

It can be divided in two parts, 1272 and 649, that multiplied together give a palindrome (825528).

The spelling of 1272649 in words is "one million, two hundred seventy-two thousand, six hundred forty-nine".