121832505 has 20 divisors (see below), whose sum is σ = 218396772. Its totient is φ = 64977120.

The previous prime is 121832467. The next prime is 121832519. The reversal of 121832505 is 505238121.

It is a happy number.

121832505 is a `hidden beast` number, since 121 + 8 + 32 + 505 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 51322896 + 70509609 = 7164^2 + 8397^2 .

It is not a de Polignac number, because 121832505 - 2⁶ = 121832441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 150006 + ... + 150815.

Almost surely, 2^121832505 is an apocalyptic number.

121832505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121832505 is a deficient number, since it is larger than the sum of its proper divisors (96564267).

121832505 is an equidigital number, since it uses as much as digits as its factorization.

121832505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300838 (or 300829 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 121832505 is about 11037.7762706081. The cubic root of 121832505 is about 495.7404895171.

The spelling of 121832505 in words is "one hundred twenty-one million, eight hundred thirty-two thousand, five hundred five".