121247560 has 48 divisors (see below), whose sum is σ = 317352060. Its totient is φ = 41569920.

The previous prime is 121247549. The next prime is 121247561. The reversal of 121247560 is 65742121.

It can be written as a sum of positive squares in 2 ways, for example, as 119552356 + 1695204 = 10934^2 + 1302^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (121247561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28971 + ... + 32890.

Almost surely, 2^121247560 is an apocalyptic number.

121247560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121247560 is an abundant number, since it is smaller than the sum of its proper divisors (196104500).

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

121247560 is a wasteful number, since it uses less digits than its factorization.

121247560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61886 (or 61875 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 121247560 is about 11011.2469775226. The cubic root of 121247560 is about 494.9458295310.

Adding to 121247560 its reverse (65742121), we get a palindrome (186989681).

The spelling of 121247560 in words is "one hundred twenty-one million, two hundred forty-seven thousand, five hundred sixty".