14137721 has 4 divisors (see below), whose sum is σ = 15225252. Its totient is φ = 13050192.

The previous prime is 14137699. The next prime is 14137759. The reversal of 14137721 is 12773141.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12773141 = 3389 ⋅3769.

It can be written as a sum of positive squares in 2 ways, for example, as 2062096 + 12075625 = 1436^2 + 3475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14137721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14137771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543746 + ... + 543771.

It is an arithmetic number, because the mean of its divisors is an integer number (3806313).

Almost surely, 2^14137721 is an apocalyptic number.

It is an amenable number.

14137721 is a deficient number, since it is larger than the sum of its proper divisors (1087531).

14137721 is a wasteful number, since it uses less digits than its factorization.

14137721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087530.

The product of its digits is 1176, while the sum is 26.

The square root of 14137721 is about 3760.0160903911. The cubic root of 14137721 is about 241.8019518921.

The spelling of 14137721 in words is "fourteen million, one hundred thirty-seven thousand, seven hundred twenty-one".