11535961 has 4 divisors (see below), whose sum is σ = 11556532. Its totient is φ = 11515392.

The previous prime is 11535941. The next prime is 11535973. The reversal of 11535961 is 16953511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9884736 + 1651225 = 3144^2 + 1285^2 .

It is a cyclic number.

It is not a de Polignac number, because 11535961 - 2⁷ = 11535833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11535941) 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, 9420 + ... + 10573.

It is an arithmetic number, because the mean of its divisors is an integer number (2889133).

Almost surely, 2^11535961 is an apocalyptic number.

It is an amenable number.

11535961 is a deficient number, since it is larger than the sum of its proper divisors (20571).

11535961 is an equidigital number, since it uses as much as digits as its factorization.

11535961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20570.

The product of its digits is 4050, while the sum is 31.

The square root of 11535961 is about 3396.4630131948. The cubic root of 11535961 is about 225.9529034918.

The spelling of 11535961 in words is "eleven million, five hundred thirty-five thousand, nine hundred sixty-one".