11920651 has 4 divisors (see below), whose sum is σ = 11939400. Its totient is φ = 11901904.

The previous prime is 11920639. The next prime is 11920661. The reversal of 11920651 is 15602911.

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 11920651 - 2¹¹ = 11918603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11920661) 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, 8386 + ... + 9703.

It is an arithmetic number, because the mean of its divisors is an integer number (2984850).

Almost surely, 2^11920651 is an apocalyptic number.

11920651 is a deficient number, since it is larger than the sum of its proper divisors (18749).

11920651 is an equidigital number, since it uses as much as digits as its factorization.

11920651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18748.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 11920651 is about 3452.6295775829. The cubic root of 11920651 is about 228.4371103143.

The spelling of 11920651 in words is "eleven million, nine hundred twenty thousand, six hundred fifty-one".