121087845 has 16 divisors (see below), whose sum is σ = 215267520. Its totient is φ = 64580112.

The previous prime is 121087843. The next prime is 121087853. The reversal of 121087845 is 548780121.

It is not a de Polignac number, because 121087845 - 2¹ = 121087843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121087843) 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, 448339 + ... + 448608.

It is an arithmetic number, because the mean of its divisors is an integer number (13454220).

Almost surely, 2^121087845 is an apocalyptic number.

121087845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121087845 is a deficient number, since it is larger than the sum of its proper divisors (94179675).

121087845 is an equidigital number, since it uses as much as digits as its factorization.

121087845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896961 (or 896955 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 121087845 is about 11003.9922300954. The cubic root of 121087845 is about 494.7284093245.

The spelling of 121087845 in words is "one hundred twenty-one million, eighty-seven thousand, eight hundred forty-five".