121648540 has 24 divisors (see below), whose sum is σ = 275113440. Its totient is φ = 44916288.

The previous prime is 121648531. The next prime is 121648561. The reversal of 121648540 is 45846121.

It is a congruent number.

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, 233680 + ... + 234199.

It is an arithmetic number, because the mean of its divisors is an integer number (11463060).

Almost surely, 2^121648540 is an apocalyptic number.

121648540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121648540 is an abundant number, since it is smaller than the sum of its proper divisors (153464900).

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

121648540 is a wasteful number, since it uses less digits than its factorization.

121648540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467901 (or 467899 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 121648540 is about 11029.4396956509. The cubic root of 121648540 is about 495.4908439329.

The spelling of 121648540 in words is "one hundred twenty-one million, six hundred forty-eight thousand, five hundred forty".