121263539 has 2 divisors, whose sum is σ = 121263540. Its totient is φ = 121263538.

The previous prime is 121263473. The next prime is 121263553. The reversal of 121263539 is 935362121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121263539 - 2¹² = 121259443 is a prime.

It is not a weakly prime, because it can be changed into another prime (121263589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60631769 + 60631770.

It is an arithmetic number, because the mean of its divisors is an integer number (60631770).

Almost surely, 2^121263539 is an apocalyptic number.

121263539 is a deficient number, since it is larger than the sum of its proper divisors (1).

121263539 is an equidigital number, since it uses as much as digits as its factorization.

121263539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 32.

The square root of 121263539 is about 11011.9725299330. The cubic root of 121263539 is about 494.9675712524.

The spelling of 121263539 in words is "one hundred twenty-one million, two hundred sixty-three thousand, five hundred thirty-nine".