121405360 has 20 divisors (see below), whose sum is σ = 282267648. Its totient is φ = 48562112.

The previous prime is 121405357. The next prime is 121405367. The reversal of 121405360 is 63504121.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×121405360² = 29478522873459200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121405367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758704 + ... + 758863.

Almost surely, 2^121405360 is an apocalyptic number.

121405360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121405360 is an abundant number, since it is smaller than the sum of its proper divisors (160862288).

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

121405360 is a wasteful number, since it uses less digits than its factorization.

121405360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517580 (or 1517574 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 121405360 is about 11018.4100486413. The cubic root of 121405360 is about 495.1604554136.

Adding to 121405360 its reverse (63504121), we get a palindrome (184909481).

The spelling of 121405360 in words is "one hundred twenty-one million, four hundred five thousand, three hundred sixty".