121588140 has 24 divisors (see below), whose sum is σ = 340446960. Its totient is φ = 32423488.

The previous prime is 121588123. The next prime is 121588141. The reversal of 121588140 is 41885121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 121588098 and 121588107.

It is not an unprimeable number, because it can be changed into a prime (121588141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1013175 + ... + 1013294.

It is an arithmetic number, because the mean of its divisors is an integer number (14185290).

Almost surely, 2^121588140 is an apocalyptic number.

121588140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121588140 is an abundant number, since it is smaller than the sum of its proper divisors (218858820).

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

121588140 is a wasteful number, since it uses less digits than its factorization.

121588140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026481 (or 2026479 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 121588140 is about 11026.7012292888. The cubic root of 121588140 is about 495.4088245858.

The spelling of 121588140 in words is "one hundred twenty-one million, five hundred eighty-eight thousand, one hundred forty".