121523140 has 24 divisors (see below), whose sum is σ = 270211032. Its totient is φ = 45749760.

The previous prime is 121523063. The next prime is 121523167. The reversal of 121523140 is 41325121.

It can be written as a sum of positive squares in 4 ways, for example, as 15350724 + 106172416 = 3918^2 + 10304^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178371 + ... + 179050.

It is an arithmetic number, because the mean of its divisors is an integer number (11258793).

Almost surely, 2^121523140 is an apocalyptic number.

121523140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121523140 is an abundant number, since it is smaller than the sum of its proper divisors (148687892).

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

121523140 is a wasteful number, since it uses less digits than its factorization.

121523140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357447 (or 357445 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 121523140 is about 11023.7534442675. The cubic root of 121523140 is about 495.3205283821.

Adding to 121523140 its reverse (41325121), we get a palindrome (162848261).

The spelling of 121523140 in words is "one hundred twenty-one million, five hundred twenty-three thousand, one hundred forty".