13681541 has 2 divisors, whose sum is σ = 13681542. Its totient is φ = 13681540.

The previous prime is 13681537. The next prime is 13681589. The reversal of 13681541 is 14518631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12630916 + 1050625 = 3554^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 13681541 - 2² = 13681537 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13681511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6840770 + 6840771.

It is an arithmetic number, because the mean of its divisors is an integer number (6840771).

Almost surely, 2^13681541 is an apocalyptic number.

It is an amenable number.

13681541 is a deficient number, since it is larger than the sum of its proper divisors (1).

13681541 is an equidigital number, since it uses as much as digits as its factorization.

13681541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 29.

The square root of 13681541 is about 3698.8567152568. The cubic root of 13681541 is about 239.1727362449.

The spelling of 13681541 in words is "thirteen million, six hundred eighty-one thousand, five hundred forty-one".