121853898 has 12 divisors (see below), whose sum is σ = 264016818. Its totient is φ = 40617960.

The previous prime is 121853891. The next prime is 121853899. The reversal of 121853898 is 898358121.

It is a happy number.

121853898 is a `hidden beast` number, since 1 + 21 + 8 + 538 + 98 = 666.

It can be written as a sum of positive squares in only one way, i.e., 110944089 + 10909809 = 10533^2 + 3303^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121853891) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3384813 + ... + 3384848.

Almost surely, 2^121853898 is an apocalyptic number.

121853898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

121853898 is an abundant number, since it is smaller than the sum of its proper divisors (142162920).

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

121853898 is a wasteful number, since it uses less digits than its factorization.

121853898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6769669 (or 6769666 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 121853898 is about 11038.7453091373. The cubic root of 121853898 is about 495.7695040936.

The spelling of 121853898 in words is "one hundred twenty-one million, eight hundred fifty-three thousand, eight hundred ninety-eight".