12054991 has 8 divisors (see below), whose sum is σ = 13064240. Its totient is φ = 11057472.

The previous prime is 12054979. The next prime is 12054997. The reversal of 12054991 is 19945021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12054991 - 2¹⁵ = 12022223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12054997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726 + ... + 4963.

It is an arithmetic number, because the mean of its divisors is an integer number (1633030).

Almost surely, 2^12054991 is an apocalyptic number.

12054991 is a deficient number, since it is larger than the sum of its proper divisors (1009249).

12054991 is a wasteful number, since it uses less digits than its factorization.

12054991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5865.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 12054991 is about 3472.0298097799. The cubic root of 12054991 is about 229.2920322254.

The spelling of 12054991 in words is "twelve million, fifty-four thousand, nine hundred ninety-one".