121541154 has 64 divisors (see below), whose sum is σ = 296165376. Its totient is φ = 32497344.

The previous prime is 121541141. The next prime is 121541191. The reversal of 121541154 is 451145121.

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 44064 + ... + 46740.

It is an arithmetic number, because the mean of its divisors is an integer number (4627584).

Almost surely, 2^121541154 is an apocalyptic number.

121541154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121541154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148082688).

121541154 is an abundant number, since it is smaller than the sum of its proper divisors (174624222).

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

121541154 is a wasteful number, since it uses less digits than its factorization.

121541154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2759.

The product of its digits is 800, while the sum is 24.

The square root of 121541154 is about 11024.5704678232. The cubic root of 121541154 is about 495.3450018093.

Adding to 121541154 its reverse (451145121), we get a palindrome (572686275).

The spelling of 121541154 in words is "one hundred twenty-one million, five hundred forty-one thousand, one hundred fifty-four".