121732845 has 16 divisors (see below), whose sum is σ = 209755392. Its totient is φ = 59929920.

The previous prime is 121732841. The next prime is 121732861. The reversal of 121732845 is 548237121.

It is not a de Polignac number, because 121732845 - 2² = 121732841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121732841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311941 + ... + 312330.

It is an arithmetic number, because the mean of its divisors is an integer number (13109712).

Almost surely, 2^121732845 is an apocalyptic number.

121732845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121732845 is a deficient number, since it is larger than the sum of its proper divisors (88022547).

121732845 is a wasteful number, since it uses less digits than its factorization.

121732845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624292.

The product of its digits is 13440, while the sum is 33.

The square root of 121732845 is about 11033.2608507186. The cubic root of 121732845 is about 495.6052793647.

Adding to 121732845 its reverse (548237121), we get a palindrome (669969966).

The spelling of 121732845 in words is "one hundred twenty-one million, seven hundred thirty-two thousand, eight hundred forty-five".