121575439 has 8 divisors (see below), whose sum is σ = 123243120. Its totient is φ = 119918016.

The previous prime is 121575427. The next prime is 121575463. The reversal of 121575439 is 934575121.

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

It is a cyclic number.

It is not a de Polignac number, because 121575439 - 2⁹ = 121574927 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 121575398 and 121575407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121575409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23004 + ... + 27790.

It is an arithmetic number, because the mean of its divisors is an integer number (15405390).

Almost surely, 2^121575439 is an apocalyptic number.

121575439 is a deficient number, since it is larger than the sum of its proper divisors (1667681).

121575439 is a wasteful number, since it uses less digits than its factorization.

121575439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5129.

The product of its digits is 37800, while the sum is 37.

The square root of 121575439 is about 11026.1252940460. The cubic root of 121575439 is about 495.3915739818.

The spelling of 121575439 in words is "one hundred twenty-one million, five hundred seventy-five thousand, four hundred thirty-nine".