121039539 has 16 divisors (see below), whose sum is σ = 165889152. Its totient is φ = 78458688.

The previous prime is 121039537. The next prime is 121039549. The reversal of 121039539 is 935930121.

It is not a de Polignac number, because 121039539 - 2¹ = 121039537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121039537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28044 + ... + 32070.

It is an arithmetic number, because the mean of its divisors is an integer number (10368072).

Almost surely, 2^121039539 is an apocalyptic number.

121039539 is a deficient number, since it is larger than the sum of its proper divisors (44849613).

121039539 is a wasteful number, since it uses less digits than its factorization.

121039539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4306.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 121039539 is about 11001.7970804774. The cubic root of 121039539 is about 494.6626126593.

The spelling of 121039539 in words is "one hundred twenty-one million, thirty-nine thousand, five hundred thirty-nine".