13451209 has 2 divisors, whose sum is σ = 13451210. Its totient is φ = 13451208.

The previous prime is 13451203. The next prime is 13451213. The reversal of 13451209 is 90215431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10465225 + 2985984 = 3235^2 + 1728^2 .

It is a cyclic number.

It is not a de Polignac number, because 13451209 - 2³ = 13451201 is a prime.

It is not a weakly prime, because it can be changed into another prime (13451201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6725604 + 6725605.

It is an arithmetic number, because the mean of its divisors is an integer number (6725605).

Almost surely, 2^13451209 is an apocalyptic number.

It is an amenable number.

13451209 is a deficient number, since it is larger than the sum of its proper divisors (1).

13451209 is an equidigital number, since it uses as much as digits as its factorization.

13451209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 13451209 is about 3667.5889900587. The cubic root of 13451209 is about 237.8229563921.

The spelling of 13451209 in words is "thirteen million, four hundred fifty-one thousand, two hundred nine".