121813450 has 48 divisors (see below), whose sum is σ = 248466240. Its totient is φ = 44064000.

The previous prime is 121813441. The next prime is 121813457. The reversal of 121813450 is 54318121.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (121813457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132091 + ... + 133009.

It is an arithmetic number, because the mean of its divisors is an integer number (5176380).

Almost surely, 2^121813450 is an apocalyptic number.

121813450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121813450 is an abundant number, since it is smaller than the sum of its proper divisors (126652790).

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

121813450 is a wasteful number, since it uses less digits than its factorization.

121813450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183 (or 1178 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 121813450 is about 11036.9130648021. The cubic root of 121813450 is about 495.7146430279.

The spelling of 121813450 in words is "one hundred twenty-one million, eight hundred thirteen thousand, four hundred fifty".