121405039 has 8 divisors (see below), whose sum is σ = 141975680. Its totient is φ = 101641176.

The previous prime is 121405027. The next prime is 121405043. The reversal of 121405039 is 930504121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121405039 - 2¹⁷ = 121273967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121405439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201369 + ... + 201970.

It is an arithmetic number, because the mean of its divisors is an integer number (17746960).

Almost surely, 2^121405039 is an apocalyptic number.

121405039 is a deficient number, since it is larger than the sum of its proper divisors (20570641).

121405039 is an equidigital number, since it uses as much as digits as its factorization.

121405039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403389.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 121405039 is about 11018.3954821017. The cubic root of 121405039 is about 495.1600190060.

The spelling of 121405039 in words is "one hundred twenty-one million, four hundred five thousand, thirty-nine".