12491903 has 8 divisors (see below), whose sum is σ = 12885648. Its totient is φ = 12101184.

The previous prime is 12491881. The next prime is 12491909. The reversal of 12491903 is 30919421.

It is a happy number.

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 12491903 - 2¹⁰ = 12490879 is a prime.

It is a super-2 number, since 2×12491903² = 312095281122818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12491909) 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, 9875 + ... + 11067.

It is an arithmetic number, because the mean of its divisors is an integer number (1610706).

Almost surely, 2^12491903 is an apocalyptic number.

12491903 is a deficient number, since it is larger than the sum of its proper divisors (393745).

12491903 is a wasteful number, since it uses less digits than its factorization.

12491903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 12491903 is about 3534.3886317155. The cubic root of 12491903 is about 232.0293202638.

The spelling of 12491903 in words is "twelve million, four hundred ninety-one thousand, nine hundred three".