13987601 has 12 divisors (see below), whose sum is σ = 14700636. Its totient is φ = 13303680.

The previous prime is 13987579. The next prime is 13987613. The reversal of 13987601 is 10678931.

It is a Cunningham number, because it is equal to 3740²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 3900625 + 10086976 = 1975^2 + 3176^2 .

It is not a de Polignac number, because 13987601 - 2⁶ = 13987537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13987621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89015 + ... + 89171.

It is an arithmetic number, because the mean of its divisors is an integer number (1225053).

Almost surely, 2^13987601 is an apocalyptic number.

It is an amenable number.

13987601 is a deficient number, since it is larger than the sum of its proper divisors (713035).

13987601 is an equidigital number, since it uses as much as digits as its factorization.

13987601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 13987601 is about 3740.0001336898. Note that the first 3 decimals coincide. The cubic root of 13987601 is about 240.9430545597.

The spelling of 13987601 in words is "thirteen million, nine hundred eighty-seven thousand, six hundred one".