121307432 has 8 divisors (see below), whose sum is σ = 227451450. Its totient is φ = 60653712.

The previous prime is 121307413. The next prime is 121307437. The reversal of 121307432 is 234703121.

It can be written as a sum of positive squares in only one way, i.e., 66161956 + 55145476 = 8134^2 + 7426^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 121307398 and 121307407.

It is not an unprimeable number, because it can be changed into a prime (121307437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7581707 + ... + 7581722.

Almost surely, 2^121307432 is an apocalyptic number.

It is an amenable number.

121307432 is a deficient number, since it is larger than the sum of its proper divisors (106144018).

121307432 is a wasteful number, since it uses less digits than its factorization.

121307432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15163435 (or 15163431 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 121307432 is about 11013.9653168148. The cubic root of 121307432 is about 495.0272841472.

The spelling of 121307432 in words is "one hundred twenty-one million, three hundred seven thousand, four hundred thirty-two".