12491145 has 32 divisors (see below), whose sum is σ = 22554240. Its totient is φ = 6557760.

The previous prime is 12491137. The next prime is 12491159. The reversal of 12491145 is 54119421.

It is not a de Polignac number, because 12491145 - 2³ = 12491137 is a prime.

It is a super-2 number, since 2×12491145² = 312057406822050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 8355 + ... + 9735.

It is an arithmetic number, because the mean of its divisors is an integer number (704820).

Almost surely, 2^12491145 is an apocalyptic number.

12491145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12491145 is a deficient number, since it is larger than the sum of its proper divisors (10063095).

12491145 is a wasteful number, since it uses less digits than its factorization.

12491145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462 (or 1456 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 12491145 is about 3534.2813979648. The cubic root of 12491145 is about 232.0246270429.

The spelling of 12491145 in words is "twelve million, four hundred ninety-one thousand, one hundred forty-five".