121598840 has 64 divisors (see below), whose sum is σ = 305458560. Its totient is φ = 43182720.

The previous prime is 121598837. The next prime is 121598881. The reversal of 121598840 is 48895121.

It is a junction number, because it is equal to n+sod(n) for n = 121598794 and 121598803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15707 + ... + 22133.

It is an arithmetic number, because the mean of its divisors is an integer number (4772790).

Almost surely, 2^121598840 is an apocalyptic number.

121598840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121598840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152729280).

121598840 is an abundant number, since it is smaller than the sum of its proper divisors (183859720).

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

121598840 is a wasteful number, since it uses less digits than its factorization.

121598840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6492 (or 6488 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 121598840 is about 11027.1864045186. The cubic root of 121598840 is about 495.4233564827.

The spelling of 121598840 in words is "one hundred twenty-one million, five hundred ninety-eight thousand, eight hundred forty".