121539481 has 8 divisors (see below), whose sum is σ = 140201280. Its totient is φ = 103202448.

The previous prime is 121539419. The next prime is 121539503. The reversal of 121539481 is 184935121.

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 121539481 - 2¹⁷ = 121408409 is a prime.

It is a super-2 number, since 2×121539481² = 29543690883498722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121539581) 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, 80386 + ... + 81883.

It is an arithmetic number, because the mean of its divisors is an integer number (17525160).

Almost surely, 2^121539481 is an apocalyptic number.

It is an amenable number.

121539481 is a deficient number, since it is larger than the sum of its proper divisors (18661799).

121539481 is a wasteful number, since it uses less digits than its factorization.

121539481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162383.

The product of its digits is 8640, while the sum is 34.

The square root of 121539481 is about 11024.4945915901. The cubic root of 121539481 is about 495.3427290099.

The spelling of 121539481 in words is "one hundred twenty-one million, five hundred thirty-nine thousand, four hundred eighty-one".