13154621 has 2 divisors, whose sum is σ = 13154622. Its totient is φ = 13154620.

The previous prime is 13154569. The next prime is 13154629. The reversal of 13154621 is 12645131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6708100 + 6446521 = 2590^2 + 2539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13154621 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 (13154629) 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 as a sum of consecutive naturals, namely, 6577310 + 6577311.

It is an arithmetic number, because the mean of its divisors is an integer number (6577311).

Almost surely, 2^13154621 is an apocalyptic number.

It is an amenable number.

13154621 is a deficient number, since it is larger than the sum of its proper divisors (1).

13154621 is an equidigital number, since it uses as much as digits as its factorization.

13154621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 13154621 is about 3626.9299689958. The cubic root of 13154621 is about 236.0620168817.

Adding to 13154621 its reverse (12645131), we get a palindrome (25799752).

The spelling of 13154621 in words is "thirteen million, one hundred fifty-four thousand, six hundred twenty-one".