121561652 has 6 divisors (see below), whose sum is σ = 212732898. Its totient is φ = 60780824.

The previous prime is 121561637. The next prime is 121561669. The reversal of 121561652 is 256165121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 120912016 + 649636 = 10996^2 + 806^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15195203 + ... + 15195210.

It is an arithmetic number, because the mean of its divisors is an integer number (35455483).

Almost surely, 2^121561652 is an apocalyptic number.

It is an amenable number.

121561652 is a deficient number, since it is larger than the sum of its proper divisors (91171246).

121561652 is a wasteful number, since it uses less digits than its factorization.

121561652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30390417 (or 30390415 counting only the distinct ones).

The product of its digits is 3600, while the sum is 29.

The square root of 121561652 is about 11025.5000793615. The cubic root of 121561652 is about 495.3728470034.

The spelling of 121561652 in words is "one hundred twenty-one million, five hundred sixty-one thousand, six hundred fifty-two".