11631545 has 4 divisors (see below), whose sum is σ = 13957860. Its totient is φ = 9305232.

The previous prime is 11631533. The next prime is 11631547. The reversal of 11631545 is 54513611.

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 2274064 + 9357481 = 1508^2 + 3059^2 .

It is a cyclic number.

It is not a de Polignac number, because 11631545 - 2⁸ = 11631289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11631547) 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, 1163150 + ... + 1163159.

It is an arithmetic number, because the mean of its divisors is an integer number (3489465).

Almost surely, 2^11631545 is an apocalyptic number.

It is an amenable number.

11631545 is a deficient number, since it is larger than the sum of its proper divisors (2326315).

11631545 is an equidigital number, since it uses as much as digits as its factorization.

11631545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326314.

The product of its digits is 1800, while the sum is 26.

The square root of 11631545 is about 3410.5050945571. The cubic root of 11631545 is about 226.5752502852.

The spelling of 11631545 in words is "eleven million, six hundred thirty-one thousand, five hundred forty-five".