121748509 has 8 divisors (see below), whose sum is σ = 129100608. Its totient is φ = 114417600.

The previous prime is 121748507. The next prime is 121748519. The reversal of 121748509 is 905847121.

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 121748509 - 2¹ = 121748507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121748507) 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, 7434 + ... + 17284.

It is an arithmetic number, because the mean of its divisors is an integer number (16137576).

Almost surely, 2^121748509 is an apocalyptic number.

It is an amenable number.

121748509 is a deficient number, since it is larger than the sum of its proper divisors (7352099).

121748509 is an equidigital number, since it uses as much as digits as its factorization.

121748509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10595.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 121748509 is about 11033.9706814909. The cubic root of 121748509 is about 495.6265358250.

The spelling of 121748509 in words is "one hundred twenty-one million, seven hundred forty-eight thousand, five hundred nine".