121653260 has 48 divisors (see below), whose sum is σ = 266384160. Its totient is φ = 46609920.

The previous prime is 121653239. The next prime is 121653313. The reversal of 121653260 is 62356121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78695 + ... + 80225.

It is an arithmetic number, because the mean of its divisors is an integer number (5549670).

Almost surely, 2^121653260 is an apocalyptic number.

121653260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121653260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133192080).

121653260 is an abundant number, since it is smaller than the sum of its proper divisors (144730900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121653260 is a wasteful number, since it uses less digits than its factorization.

121653260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706 (or 1704 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 121653260 is about 11029.6536663669. The cubic root of 121653260 is about 495.4972522481.

The spelling of 121653260 in words is "one hundred twenty-one million, six hundred fifty-three thousand, two hundred sixty".