1276720 has 20 divisors (see below), whose sum is σ = 2968560. Its totient is φ = 510656.

The previous prime is 1276711. The next prime is 1276721. The reversal of 1276720 is 276721.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (1276721) 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, 7900 + ... + 8059.

It is an arithmetic number, because the mean of its divisors is an integer number (148428).

2^1276720 is an apocalyptic number.

1276720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1276720 is an abundant number, since it is smaller than the sum of its proper divisors (1691840).

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

1276720 is a wasteful number, since it uses less digits than its factorization.

1276720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15972 (or 15966 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 1276720 is about 1129.9203511752. The cubic root of 1276720 is about 108.4838827313.

Subtracting from 1276720 its reverse (276721), we obtain a palindrome (999999).

The spelling of 1276720 in words is "one million, two hundred seventy-six thousand, seven hundred twenty".