11278513 has 8 divisors (see below), whose sum is σ = 11914496. Its totient is φ = 10659600.

The previous prime is 11278507. The next prime is 11278523. The reversal of 11278513 is 31587211.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11278513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11278523) 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, 2898 + ... + 5563.

It is an arithmetic number, because the mean of its divisors is an integer number (1489312).

Almost surely, 2^11278513 is an apocalyptic number.

It is an amenable number.

11278513 is a deficient number, since it is larger than the sum of its proper divisors (635983).

11278513 is an equidigital number, since it uses as much as digits as its factorization.

11278513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8535.

The product of its digits is 1680, while the sum is 28.

The square root of 11278513 is about 3358.3497435497. The cubic root of 11278513 is about 224.2593788010.

The spelling of 11278513 in words is "eleven million, two hundred seventy-eight thousand, five hundred thirteen".