121517385 has 16 divisors (see below), whose sum is σ = 212103360. Its totient is φ = 58917440.

The previous prime is 121517359. The next prime is 121517387. The reversal of 121517385 is 583715121.

It is not a de Polignac number, because 121517385 - 2⁵ = 121517353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (121517387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368070 + ... + 368399.

It is an arithmetic number, because the mean of its divisors is an integer number (13256460).

Almost surely, 2^121517385 is an apocalyptic number.

121517385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121517385 is a deficient number, since it is larger than the sum of its proper divisors (90585975).

121517385 is a wasteful number, since it uses less digits than its factorization.

121517385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736488.

The product of its digits is 8400, while the sum is 33.

The square root of 121517385 is about 11023.4924139313. The cubic root of 121517385 is about 495.3127092550.

The spelling of 121517385 in words is "one hundred twenty-one million, five hundred seventeen thousand, three hundred eighty-five".