154121 has 4 divisors (see below), whose sum is σ = 168144. Its totient is φ = 140100.

The previous prime is 154111. The next prime is 154127. The reversal of 154121 is 121451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 154121 - 2⁶ = 154057 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154096 and 154105.

It is not an unprimeable number, because it can be changed into a prime (154127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6995 + ... + 7016.

It is an arithmetic number, because the mean of its divisors is an integer number (42036).

2¹⁵⁴¹²¹ is an apocalyptic number.

154121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

154121 is a deficient number, since it is larger than the sum of its proper divisors (14023).

154121 is a wasteful number, since it uses less digits than its factorization.

154121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14022.

The product of its digits is 40, while the sum is 14.

The square root of 154121 is about 392.5824754112. The cubic root of 154121 is about 53.6151188137.

Adding to 154121 its reverse (121451), we get a palindrome (275572).

The spelling of 154121 in words is "one hundred fifty-four thousand, one hundred twenty-one".