121532161 has 8 divisors (see below), whose sum is σ = 130244544. Its totient is φ = 113105520.

The previous prime is 121532149. The next prime is 121532209. The reversal of 121532161 is 161235121.

It is a happy number.

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 121532161 - 2⁹ = 121531649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121533161) 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, 70555 + ... + 72256.

It is an arithmetic number, because the mean of its divisors is an integer number (16280568).

Almost surely, 2^121532161 is an apocalyptic number.

It is an amenable number.

121532161 is a deficient number, since it is larger than the sum of its proper divisors (8712383).

121532161 is a wasteful number, since it uses less digits than its factorization.

121532161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142871.

The product of its digits is 360, while the sum is 22.

The square root of 121532161 is about 11024.1625985832. The cubic root of 121532161 is about 495.3327844181.

Adding to 121532161 its reverse (161235121), we get a palindrome (282767282).

The spelling of 121532161 in words is "one hundred twenty-one million, five hundred thirty-two thousand, one hundred sixty-one".