12140309 has 2 divisors, whose sum is σ = 12140310. Its totient is φ = 12140308.

The previous prime is 12140291. The next prime is 12140341. The reversal of 12140309 is 90304121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9284209 + 2856100 = 3047^2 + 1690^2 .

It is a cyclic number.

It is not a de Polignac number, because 12140309 - 2¹² = 12136213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12140509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6070154 + 6070155.

It is an arithmetic number, because the mean of its divisors is an integer number (6070155).

Almost surely, 2^12140309 is an apocalyptic number.

It is an amenable number.

12140309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12140309 is an equidigital number, since it uses as much as digits as its factorization.

12140309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 12140309 is about 3484.2946201491. The cubic root of 12140309 is about 229.8316916109.

The spelling of 12140309 in words is "twelve million, one hundred forty thousand, three hundred nine".