121653416 has 8 divisors (see below), whose sum is σ = 228100170. Its totient is φ = 60826704.

The previous prime is 121653401. The next prime is 121653419. The reversal of 121653416 is 614356121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 80102500 + 41550916 = 8950^2 + 6446^2 .

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

It is not an unprimeable number, because it can be changed into a prime (121653419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7603331 + ... + 7603346.

Almost surely, 2^121653416 is an apocalyptic number.

It is an amenable number.

121653416 is a deficient number, since it is larger than the sum of its proper divisors (106446754).

121653416 is a wasteful number, since it uses less digits than its factorization.

121653416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15206683 (or 15206679 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 121653416 is about 11029.6607382095. The cubic root of 121653416 is about 495.4974640455.

The spelling of 121653416 in words is "one hundred twenty-one million, six hundred fifty-three thousand, four hundred sixteen".