121567172 has 6 divisors (see below), whose sum is σ = 212742558. Its totient is φ = 60783584.

The previous prime is 121567139. The next prime is 121567177. The reversal of 121567172 is 271765121.

It can be written as a sum of positive squares in only one way, i.e., 118897216 + 2669956 = 10904^2 + 1634^2 .

It is not an unprimeable number, because it can be changed into a prime (121567177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15195893 + ... + 15195900.

It is an arithmetic number, because the mean of its divisors is an integer number (35457093).

Almost surely, 2^121567172 is an apocalyptic number.

It is an amenable number.

121567172 is a deficient number, since it is larger than the sum of its proper divisors (91175386).

121567172 is a wasteful number, since it uses less digits than its factorization.

121567172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30391797 (or 30391795 counting only the distinct ones).

The product of its digits is 5880, while the sum is 32.

The square root of 121567172 is about 11025.7504053012. The cubic root of 121567172 is about 495.3803450279.

The spelling of 121567172 in words is "one hundred twenty-one million, five hundred sixty-seven thousand, one hundred seventy-two".