12491801 has 16 divisors (see below), whose sum is σ = 14936064. Its totient is φ = 10224144.

The previous prime is 12491789. The next prime is 12491807. The reversal of 12491801 is 10819421.

It is not a de Polignac number, because 12491801 - 2¹⁴ = 12475417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12491807) 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 15 ways as a sum of consecutive naturals, for example, 13706 + ... + 14588.

It is an arithmetic number, because the mean of its divisors is an integer number (933504).

Almost surely, 2^12491801 is an apocalyptic number.

It is an amenable number.

12491801 is a deficient number, since it is larger than the sum of its proper divisors (2444263).

12491801 is an equidigital number, since it uses as much as digits as its factorization.

12491801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 12491801 is about 3534.3742020335. The cubic root of 12491801 is about 232.0286887333.

The spelling of 12491801 in words is "twelve million, four hundred ninety-one thousand, eight hundred one".