121285908 has 36 divisors (see below), whose sum is σ = 310285248. Its totient is φ = 39940560.

The previous prime is 121285903. The next prime is 121285937. The reversal of 121285908 is 809582121.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121285903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17308 + ... + 23283.

Almost surely, 2^121285908 is an apocalyptic number.

121285908 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121285908 is an abundant number, since it is smaller than the sum of its proper divisors (188999340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121285908 is a wasteful number, since it uses less digits than its factorization.

121285908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40684 (or 40679 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 121285908 is about 11012.9881503614. The cubic root of 121285908 is about 494.9980042772.

The spelling of 121285908 in words is "one hundred twenty-one million, two hundred eighty-five thousand, nine hundred eight".