14621381 has 2 divisors, whose sum is σ = 14621382. Its totient is φ = 14621380.

The previous prime is 14621359. The next prime is 14621407. The reversal of 14621381 is 18312641.

It is an a-pointer prime, because the next prime (14621407) can be obtained adding 14621381 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12013156 + 2608225 = 3466^2 + 1615^2 .

It is a cyclic number.

It is not a de Polignac number, because 14621381 - 2²² = 10427077 is a prime.

It is a super-2 number, since 2×14621381² = 427569564694322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 14621381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14621281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7310690 + 7310691.

It is an arithmetic number, because the mean of its divisors is an integer number (7310691).

Almost surely, 2^14621381 is an apocalyptic number.

It is an amenable number.

14621381 is a deficient number, since it is larger than the sum of its proper divisors (1).

14621381 is an equidigital number, since it uses as much as digits as its factorization.

14621381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 14621381 is about 3823.7914430575. The cubic root of 14621381 is about 244.5284892287.

The spelling of 14621381 in words is "fourteen million, six hundred twenty-one thousand, three hundred eighty-one".