12901409 has 2 divisors, whose sum is σ = 12901410. Its totient is φ = 12901408.

The previous prime is 12901403. The next prime is 12901423. The reversal of 12901409 is 90410921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12229009 + 672400 = 3497^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 12901409 - 2⁴ = 12901393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12901403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6450704 + 6450705.

It is an arithmetic number, because the mean of its divisors is an integer number (6450705).

Almost surely, 2^12901409 is an apocalyptic number.

It is an amenable number.

12901409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12901409 is an equidigital number, since it uses as much as digits as its factorization.

12901409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 12901409 is about 3591.8531428776. The cubic root of 12901409 is about 234.5375483720.

The spelling of 12901409 in words is "twelve million, nine hundred one thousand, four hundred nine".