121520506 has 16 divisors (see below), whose sum is σ = 188017920. Its totient is φ = 58862160.

The previous prime is 121520501. The next prime is 121520519. The reversal of 121520506 is 605025121.

It is not an unprimeable number, because it can be changed into a prime (121520501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14251 + ... + 21121.

It is an arithmetic number, because the mean of its divisors is an integer number (11751120).

Almost surely, 2^121520506 is an apocalyptic number.

121520506 is a deficient number, since it is larger than the sum of its proper divisors (66497414).

121520506 is a wasteful number, since it uses less digits than its factorization.

121520506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7149.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 121520506 is about 11023.6339743299. The cubic root of 121520506 is about 495.3169496845.

Adding to 121520506 its reverse (605025121), we get a palindrome (726545627).

The spelling of 121520506 in words is "one hundred twenty-one million, five hundred twenty thousand, five hundred six".