121532144 has 20 divisors (see below), whose sum is σ = 235854696. Its totient is φ = 60666432.

The previous prime is 121532119. The next prime is 121532149. The reversal of 121532144 is 441235121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121532149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4382 + ... + 16194.

Almost surely, 2^121532144 is an apocalyptic number.

It is an amenable number.

121532144 is a deficient number, since it is larger than the sum of its proper divisors (114322552).

121532144 is a wasteful number, since it uses less digits than its factorization.

121532144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12464 (or 12458 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 121532144 is about 11024.1618275495. The cubic root of 121532144 is about 495.3327613223.

Adding to 121532144 its reverse (441235121), we get a palindrome (562767265).

The spelling of 121532144 in words is "one hundred twenty-one million, five hundred thirty-two thousand, one hundred forty-four".