14139581 has 2 divisors, whose sum is σ = 14139582. Its totient is φ = 14139580.

The previous prime is 14139571. The next prime is 14139599. The reversal of 14139581 is 18593141.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11764900 + 2374681 = 3430^2 + 1541^2 .

It is a cyclic number.

It is not a de Polignac number, because 14139581 - 2²² = 9945277 is a prime.

It is a super-2 number, since 2×14139581² = 399855501711122, which contains 22 as substring.

It is a Chen prime.

It is equal to p₉₁₈₅₈₁ and since 14139581 and 918581 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14139551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7069790 + 7069791.

It is an arithmetic number, because the mean of its divisors is an integer number (7069791).

Almost surely, 2^14139581 is an apocalyptic number.

It is an amenable number.

14139581 is a deficient number, since it is larger than the sum of its proper divisors (1).

14139581 is an equidigital number, since it uses as much as digits as its factorization.

14139581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 32.

The square root of 14139581 is about 3760.2634216235. The cubic root of 14139581 is about 241.8125554849.

The spelling of 14139581 in words is "fourteen million, one hundred thirty-nine thousand, five hundred eighty-one".