121324540 has 48 divisors (see below), whose sum is σ = 269575488. Its totient is φ = 45771264.

The previous prime is 121324523. The next prime is 121324559. The reversal of 121324540 is 45423121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31774 + ... + 35386.

It is an arithmetic number, because the mean of its divisors is an integer number (5616156).

Almost surely, 2^121324540 is an apocalyptic number.

121324540 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 121324540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134787744).

121324540 is an abundant number, since it is smaller than the sum of its proper divisors (148250948).

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

121324540 is a wasteful number, since it uses less digits than its factorization.

121324540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3718 (or 3716 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 121324540 is about 11014.7419397823. The cubic root of 121324540 is about 495.0505543034.

Adding to 121324540 its reverse (45423121), we get a palindrome (166747661).

The spelling of 121324540 in words is "one hundred twenty-one million, three hundred twenty-four thousand, five hundred forty".