14981561 has 4 divisors (see below), whose sum is σ = 17121792. Its totient is φ = 12841332.

The previous prime is 14981543. The next prime is 14981567. The reversal of 14981561 is 16518941.

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 de Polignac number, because none of the positive numbers 2^k-14981561 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 (14981567) 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 3 ways as a sum of consecutive naturals, for example, 1070105 + ... + 1070118.

It is an arithmetic number, because the mean of its divisors is an integer number (4280448).

Almost surely, 2^14981561 is an apocalyptic number.

It is an amenable number.

14981561 is a deficient number, since it is larger than the sum of its proper divisors (2140231).

14981561 is an equidigital number, since it uses as much as digits as its factorization.

14981561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140230.

The product of its digits is 8640, while the sum is 35.

The square root of 14981561 is about 3870.6021495369. The cubic root of 14981561 is about 246.5201115873.

The spelling of 14981561 in words is "fourteen million, nine hundred eighty-one thousand, five hundred sixty-one".