120661550 has 12 divisors (see below), whose sum is σ = 224430576. Its totient is φ = 48264600.

The previous prime is 120661531. The next prime is 120661553. The reversal of 120661550 is 55166021.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120661553) 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 5 ways as a sum of consecutive naturals, for example, 1206566 + ... + 1206665.

It is an arithmetic number, because the mean of its divisors is an integer number (18702548).

Almost surely, 2^120661550 is an apocalyptic number.

120661550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120661550 is a deficient number, since it is larger than the sum of its proper divisors (103769026).

120661550 is a wasteful number, since it uses less digits than its factorization.

120661550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413243 (or 2413238 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 120661550 is about 10984.6051362805. The cubic root of 120661550 is about 494.1471557535.

The spelling of 120661550 in words is "one hundred twenty million, six hundred sixty-one thousand, five hundred fifty".