11920547 has 4 divisors (see below), whose sum is σ = 12071520. Its totient is φ = 11769576.

The previous prime is 11920541. The next prime is 11920561. The reversal of 11920547 is 74502911.

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

It is a cyclic number.

It is not a de Polignac number, because 11920547 - 2⁸ = 11920291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11920541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75368 + ... + 75525.

It is an arithmetic number, because the mean of its divisors is an integer number (3017880).

Almost surely, 2^11920547 is an apocalyptic number.

11920547 is a deficient number, since it is larger than the sum of its proper divisors (150973).

11920547 is an equidigital number, since it uses as much as digits as its factorization.

11920547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150972.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 11920547 is about 3452.6145165657. The cubic root of 11920547 is about 228.4364459901.

The spelling of 11920547 in words is "eleven million, nine hundred twenty thousand, five hundred forty-seven".