11660531 has 4 divisors (see below), whose sum is σ = 11732232. Its totient is φ = 11588832.

The previous prime is 11660503. The next prime is 11660549. The reversal of 11660531 is 13506611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13506611 = 881 ⋅15331.

It is a cyclic number.

It is not a de Polignac number, because 11660531 - 2¹⁰ = 11659507 is a prime.

It is a super-2 number, since 2×11660531² = 271935966403922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11660497 and 11660506.

It is not an unprimeable number, because it can be changed into a prime (11660731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35606 + ... + 35931.

It is an arithmetic number, because the mean of its divisors is an integer number (2933058).

Almost surely, 2^11660531 is an apocalyptic number.

11660531 is a deficient number, since it is larger than the sum of its proper divisors (71701).

11660531 is an equidigital number, since it uses as much as digits as its factorization.

11660531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71700.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 11660531 is about 3414.7519675666. The cubic root of 11660531 is about 226.7633039014.

The spelling of 11660531 in words is "eleven million, six hundred sixty thousand, five hundred thirty-one".