121254816 has 24 divisors (see below), whose sum is σ = 318294144. Its totient is φ = 40418240.

The previous prime is 121254799. The next prime is 121254817. The reversal of 121254816 is 618452121.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (121254817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631440 + ... + 631631.

It is an arithmetic number, because the mean of its divisors is an integer number (13262256).

Almost surely, 2^121254816 is an apocalyptic number.

121254816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121254816 is an abundant number, since it is smaller than the sum of its proper divisors (197039328).

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

121254816 is a wasteful number, since it uses less digits than its factorization.

121254816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263084 (or 1263076 counting only the distinct ones).

The product of its digits is 3840, while the sum is 30.

The square root of 121254816 is about 11011.5764538961. The cubic root of 121254816 is about 494.9557025965.

The spelling of 121254816 in words is "one hundred twenty-one million, two hundred fifty-four thousand, eight hundred sixteen".