121432756 has 12 divisors (see below), whose sum is σ = 212605092. Its totient is φ = 60688448.

The previous prime is 121432747. The next prime is 121432769. The reversal of 121432756 is 657234121.

It can be written as a sum of positive squares in 2 ways, for example, as 39891856 + 81540900 = 6316^2 + 9030^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5136 + ... + 16408.

It is an arithmetic number, because the mean of its divisors is an integer number (17717091).

Almost surely, 2^121432756 is an apocalyptic number.

It is an amenable number.

121432756 is a deficient number, since it is larger than the sum of its proper divisors (91172336).

121432756 is a wasteful number, since it uses less digits than its factorization.

121432756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13970 (or 13968 counting only the distinct ones).

The product of its digits is 10080, while the sum is 31.

The square root of 121432756 is about 11019.6531705857. The cubic root of 121432756 is about 495.1976981284.

Adding to 121432756 its reverse (657234121), we get a palindrome (778666877).

The spelling of 121432756 in words is "one hundred twenty-one million, four hundred thirty-two thousand, seven hundred fifty-six".