14991481 has 4 divisors (see below), whose sum is σ = 15033600. Its totient is φ = 14949364.

The previous prime is 14991439. The next prime is 14991491. The reversal of 14991481 is 18419941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 14991481 - 2¹³ = 14983289 is a prime.

It is a super-2 number, since 2×14991481² = 449489005146722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 14991481.

It is not an unprimeable number, because it can be changed into a prime (14991491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20521 + ... + 21238.

It is an arithmetic number, because the mean of its divisors is an integer number (3758400).

Almost surely, 2^14991481 is an apocalyptic number.

It is an amenable number.

14991481 is a deficient number, since it is larger than the sum of its proper divisors (42119).

14991481 is an equidigital number, since it uses as much as digits as its factorization.

14991481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42118.

The product of its digits is 10368, while the sum is 37.

The square root of 14991481 is about 3871.8833918392. The cubic root of 14991481 is about 246.5745104569.

The spelling of 14991481 in words is "fourteen million, nine hundred ninety-one thousand, four hundred eighty-one".