154121856 has 96 divisors (see below), whose sum is σ = 476282880. Its totient is φ = 44029440.

The previous prime is 154121843. The next prime is 154121857. The reversal of 154121856 is 658121451.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (154121857) 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 11 ways as a sum of consecutive naturals, for example, 14721 + ... + 22911.

It is an arithmetic number, because the mean of its divisors is an integer number (4961280).

Almost surely, 2^154121856 is an apocalyptic number.

154121856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154121856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238141440).

154121856 is an abundant number, since it is smaller than the sum of its proper divisors (322161024).

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

154121856 is an equidigital number, since it uses as much as digits as its factorization.

154121856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8222 (or 8203 counting only the distinct ones).

The product of its digits is 9600, while the sum is 33.

The square root of 154121856 is about 12414.5823932986. The cubic root of 154121856 is about 536.1521807437.

The spelling of 154121856 in words is "one hundred fifty-four million, one hundred twenty-one thousand, eight hundred fifty-six".