121598838 has 24 divisors (see below), whose sum is σ = 274920048. Its totient is φ = 38770512.

The previous prime is 121598837. The next prime is 121598881. The reversal of 121598838 is 838895121.

It is a happy number.

121598838 is a `hidden beast` number, since 1 + 21 + 598 + 8 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 121598793 and 121598802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121598837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146445 + ... + 147272.

It is an arithmetic number, because the mean of its divisors is an integer number (11455002).

Almost surely, 2^121598838 is an apocalyptic number.

121598838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

121598838 is an abundant number, since it is smaller than the sum of its proper divisors (153321210).

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

121598838 is a wasteful number, since it uses less digits than its factorization.

121598838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293748 (or 293745 counting only the distinct ones).

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

The square root of 121598838 is about 11027.1863138336. The cubic root of 121598838 is about 495.4233537665.

The spelling of 121598838 in words is "one hundred twenty-one million, five hundred ninety-eight thousand, eight hundred thirty-eight".