11513021 has 8 divisors (see below), whose sum is σ = 12429144. Its totient is φ = 10601280.

The previous prime is 11513017. The next prime is 11513039. The reversal of 11513021 is 12031511.

It can be written as a sum of positive squares in 4 ways, for example, as 290521 + 11222500 = 539^2 + 3350^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11513021 - 2² = 11513017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11512987 and 11513005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11513321) 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, 6215 + ... + 7851.

It is an arithmetic number, because the mean of its divisors is an integer number (1553643).

Almost surely, 2^11513021 is an apocalyptic number.

It is an amenable number.

11513021 is a deficient number, since it is larger than the sum of its proper divisors (916123).

11513021 is a wasteful number, since it uses less digits than its factorization.

11513021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 11513021 is about 3393.0842901408. The cubic root of 11513021 is about 225.8030301459.

Adding to 11513021 its reverse (12031511), we get a palindrome (23544532).

The spelling of 11513021 in words is "eleven million, five hundred thirteen thousand, twenty-one".