121358539 has 2 divisors, whose sum is σ = 121358540. Its totient is φ = 121358538.

The previous prime is 121358473. The next prime is 121358569. The reversal of 121358539 is 935853121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121358539 - 2¹³ = 121350347 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 121358498 and 121358507.

It is not a weakly prime, because it can be changed into another prime (121358569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60679269 + 60679270.

It is an arithmetic number, because the mean of its divisors is an integer number (60679270).

Almost surely, 2^121358539 is an apocalyptic number.

121358539 is a deficient number, since it is larger than the sum of its proper divisors (1).

121358539 is an equidigital number, since it uses as much as digits as its factorization.

121358539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 37.

The square root of 121358539 is about 11016.2851724163. The cubic root of 121358539 is about 495.0967929617.

The spelling of 121358539 in words is "one hundred twenty-one million, three hundred fifty-eight thousand, five hundred thirty-nine".