1272644 has 6 divisors (see below), whose sum is σ = 2227134. Its totient is φ = 636320.

The previous prime is 1272641. The next prime is 1272647. The reversal of 1272644 is 4462721.

It is an interprime number because it is at equal distance from previous prime (1272641) and next prime (1272647).

It can be written as a sum of positive squares in only one way, i.e., 1236544 + 36100 = 1112^2 + 190^2 .

It is not an unprimeable number, because it can be changed into a prime (1272641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159077 + ... + 159084.

It is an arithmetic number, because the mean of its divisors is an integer number (371189).

2^1272644 is an apocalyptic number.

It is an amenable number.

1272644 is a deficient number, since it is larger than the sum of its proper divisors (954490).

1272644 is a wasteful number, since it uses less digits than its factorization.

1272644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318165 (or 318163 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 1272644 is about 1128.1152423401. The cubic root of 1272644 is about 108.3683127018.

The spelling of 1272644 in words is "one million, two hundred seventy-two thousand, six hundred forty-four".