121152840 has 64 divisors (see below), whose sum is σ = 371208960. Its totient is φ = 31618560.

The previous prime is 121152839. The next prime is 121152853. The reversal of 121152840 is 48251121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 121152840.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5101 + ... + 16380.

It is an arithmetic number, because the mean of its divisors is an integer number (5800140).

Almost surely, 2^121152840 is an apocalyptic number.

121152840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121152840 is an abundant number, since it is smaller than the sum of its proper divisors (250056120).

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

121152840 is a wasteful number, since it uses less digits than its factorization.

121152840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21542 (or 21538 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 121152840 is about 11006.9450802664. The cubic root of 121152840 is about 494.8169101468.

The spelling of 121152840 in words is "one hundred twenty-one million, one hundred fifty-two thousand, eight hundred forty".