1272656 has 40 divisors (see below), whose sum is σ = 3077184. Its totient is φ = 495360.

The previous prime is 1272653. The next prime is 1272673. The reversal of 1272656 is 6562721.

1272656 = T₂₁ + T₂₂ + ... + T₁₉₆.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716 + ... + 1748.

2^1272656 is an apocalyptic number.

1272656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1538592).

1272656 is an abundant number, since it is smaller than the sum of its proper divisors (1804528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1272656 is a wasteful number, since it uses less digits than its factorization.

1272656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059 (or 1053 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 1272656 is about 1128.1205609331. The cubic root of 1272656 is about 108.3686533091.

The spelling of 1272656 in words is "one million, two hundred seventy-two thousand, six hundred fifty-six".