14400781 has 2 divisors, whose sum is σ = 14400782. Its totient is φ = 14400780.

The previous prime is 14400773. The next prime is 14400797. The reversal of 14400781 is 18700441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12602500 + 1798281 = 3550^2 + 1341^2 .

It is a cyclic number.

It is not a de Polignac number, because 14400781 - 2³ = 14400773 is a prime.

It is a super-2 number, since 2×14400781² = 414764986819922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14400721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7200390 + 7200391.

It is an arithmetic number, because the mean of its divisors is an integer number (7200391).

Almost surely, 2^14400781 is an apocalyptic number.

It is an amenable number.

14400781 is a deficient number, since it is larger than the sum of its proper divisors (1).

14400781 is an equidigital number, since it uses as much as digits as its factorization.

14400781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 14400781 is about 3794.8360965923. The cubic root of 14400781 is about 243.2924780765.

The spelling of 14400781 in words is "fourteen million, four hundred thousand, seven hundred eighty-one".