121500540 has 96 divisors (see below), whose sum is σ = 432015360. Its totient is φ = 27770688.

The previous prime is 121500527. The next prime is 121500541. The reversal of 121500540 is 45005121.

121500540 is a `hidden beast` number, since 121 + 5 + 0 + 0 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121500541) 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 31 ways as a sum of consecutive naturals, for example, 12292 + ... + 19851.

It is an arithmetic number, because the mean of its divisors is an integer number (4500160).

Almost surely, 2^121500540 is an apocalyptic number.

121500540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121500540 is an abundant number, since it is smaller than the sum of its proper divisors (310514820).

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

121500540 is a wasteful number, since it uses less digits than its factorization.

121500540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32168 (or 32160 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 121500540 is about 11022.7283373945. The cubic root of 121500540 is about 495.2898210947.

Adding to 121500540 its reverse (45005121), we get a palindrome (166505661).

It can be divided in two parts, 121500 and 540, that multiplied together give a 4-th power (65610000 = 90⁴).

The spelling of 121500540 in words is "one hundred twenty-one million, five hundred thousand, five hundred forty".