14780981 has 4 divisors (see below), whose sum is σ = 15290700. Its totient is φ = 14271264.

The previous prime is 14780977. The next prime is 14780989. The reversal of 14780981 is 18908741.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3118756 + 11662225 = 1766^2 + 3415^2 .

It is a cyclic number.

It is not a de Polignac number, because 14780981 - 2² = 14780977 is a prime.

It is a super-2 number, since 2×14780981² = 436954798644722, 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 (14780989) 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, 254816 + ... + 254873.

It is an arithmetic number, because the mean of its divisors is an integer number (3822675).

Almost surely, 2^14780981 is an apocalyptic number.

It is an amenable number.

14780981 is a deficient number, since it is larger than the sum of its proper divisors (509719).

14780981 is an equidigital number, since it uses as much as digits as its factorization.

14780981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509718.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 14780981 is about 3844.6041408707. The cubic root of 14780981 is about 245.4149901384.

The spelling of 14780981 in words is "fourteen million, seven hundred eighty thousand, nine hundred eighty-one".