121606245 has 32 divisors (see below), whose sum is σ = 219747840. Its totient is φ = 63789120.

The previous prime is 121606241. The next prime is 121606259. The reversal of 121606245 is 542606121.

121606245 is a `hidden beast` number, since 12 + 1 + 606 + 2 + 45 = 666.

It is not a de Polignac number, because 121606245 - 2² = 121606241 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121606241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 852 + ... + 15618.

It is an arithmetic number, because the mean of its divisors is an integer number (6867120).

Almost surely, 2^121606245 is an apocalyptic number.

121606245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121606245 is a deficient number, since it is larger than the sum of its proper divisors (98141595).

121606245 is a wasteful number, since it uses less digits than its factorization.

121606245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14842 (or 14836 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 121606245 is about 11027.5221604856. The cubic root of 121606245 is about 495.4334128711.

The spelling of 121606245 in words is "one hundred twenty-one million, six hundred six thousand, two hundred forty-five".