121560550 has 12 divisors (see below), whose sum is σ = 226102716. Its totient is φ = 48624200.

The previous prime is 121560493. The next prime is 121560583. The reversal of 121560550 is 55065121.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1215556 + ... + 1215655.

It is an arithmetic number, because the mean of its divisors is an integer number (18841893).

Almost surely, 2^121560550 is an apocalyptic number.

121560550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121560550 is a deficient number, since it is larger than the sum of its proper divisors (104542166).

121560550 is a wasteful number, since it uses less digits than its factorization.

121560550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431223 (or 2431218 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 121560550 is about 11025.4501041908. The cubic root of 121560550 is about 495.3713500880.

The spelling of 121560550 in words is "one hundred twenty-one million, five hundred sixty thousand, five hundred fifty".