14420781 has 16 divisors (see below), whose sum is σ = 21862720. Its totient is φ = 9389520.

The previous prime is 14420779. The next prime is 14420837. The reversal of 14420781 is 18702441.

14420781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 14420781 - 2¹ = 14420779 is a prime.

It is a super-2 number, since 2×14420781² = 415917849299922, which contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14425781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5050 + ... + 7371.

It is an arithmetic number, because the mean of its divisors is an integer number (1366420).

Almost surely, 2^14420781 is an apocalyptic number.

It is an amenable number.

14420781 is a deficient number, since it is larger than the sum of its proper divisors (7441939).

14420781 is a wasteful number, since it uses less digits than its factorization.

14420781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12473 (or 12467 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 14420781 is about 3797.4703422147. The cubic root of 14420781 is about 243.4050552743.

The spelling of 14420781 in words is "fourteen million, four hundred twenty thousand, seven hundred eighty-one".