13440061 has 4 divisors (see below), whose sum is σ = 13463932. Its totient is φ = 13416192.

The previous prime is 13440059. The next prime is 13440071. The reversal of 13440061 is 16004431.

It is a happy number.

13440061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7344100 + 6095961 = 2710^2 + 2469^2 .

It is a cyclic number.

It is not a de Polignac number, because 13440061 - 2¹ = 13440059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440001) 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, 11070 + ... + 12223.

It is an arithmetic number, because the mean of its divisors is an integer number (3365983).

Almost surely, 2^13440061 is an apocalyptic number.

It is an amenable number.

13440061 is a deficient number, since it is larger than the sum of its proper divisors (23871).

13440061 is an equidigital number, since it uses as much as digits as its factorization.

13440061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23870.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 13440061 is about 3666.0688755123. The cubic root of 13440061 is about 237.7572378116.

Adding to 13440061 its reverse (16004431), we get a palindrome (29444492).

The spelling of 13440061 in words is "thirteen million, four hundred forty thousand, sixty-one".