154224121 has 4 divisors (see below), whose sum is σ = 162341200. Its totient is φ = 146107044.

The previous prime is 154224113. The next prime is 154224139. The reversal of 154224121 is 121422451.

154224121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121422451 = 23 ⋅5279237.

It is a cyclic number.

It is not a de Polignac number, because 154224121 - 2³ = 154224113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154224092 and 154224101.

It is not an unprimeable number, because it can be changed into a prime (154221121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4058511 + ... + 4058548.

It is an arithmetic number, because the mean of its divisors is an integer number (40585300).

Almost surely, 2^154224121 is an apocalyptic number.

It is an amenable number.

154224121 is a deficient number, since it is larger than the sum of its proper divisors (8117079).

154224121 is an equidigital number, since it uses as much as digits as its factorization.

154224121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8117078.

The product of its digits is 640, while the sum is 22.

The square root of 154224121 is about 12418.7004553617. The cubic root of 154224121 is about 536.2707394858.

Adding to 154224121 its reverse (121422451), we get a palindrome (275646572).

The spelling of 154224121 in words is "one hundred fifty-four million, two hundred twenty-four thousand, one hundred twenty-one".