11276721 has 12 divisors (see below), whose sum is σ = 16335540. Its totient is φ = 7496160.

The previous prime is 11276719. The next prime is 11276723. The reversal of 11276721 is 12767211.

It is an interprime number because it is at equal distance from previous prime (11276719) and next prime (11276723).

It can be written as a sum of positive squares in 2 ways, for example, as 5688225 + 5588496 = 2385^2 + 2364^2 .

It is not a de Polignac number, because 11276721 - 2¹ = 11276719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11276723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1891 + ... + 5111.

It is an arithmetic number, because the mean of its divisors is an integer number (1361295).

Almost surely, 2^11276721 is an apocalyptic number.

It is an amenable number.

11276721 is a deficient number, since it is larger than the sum of its proper divisors (5058819).

11276721 is a wasteful number, since it uses less digits than its factorization.

11276721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3616 (or 3613 counting only the distinct ones).

The product of its digits is 1176, while the sum is 27.

The square root of 11276721 is about 3358.0829352474. The cubic root of 11276721 is about 224.2475009322.

The spelling of 11276721 in words is "eleven million, two hundred seventy-six thousand, seven hundred twenty-one".