154425121 has 4 divisors (see below), whose sum is σ = 154677652. Its totient is φ = 154172592.

The previous prime is 154425113. The next prime is 154425137. The reversal of 154425121 is 121524451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121524451 = 41 ⋅2964011.

It can be written as a sum of positive squares in 2 ways, for example, as 65028096 + 89397025 = 8064^2 + 9455^2 .

It is a cyclic number.

It is not a de Polignac number, because 154425121 - 2³ = 154425113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154420121) 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, 125346 + ... + 126571.

It is an arithmetic number, because the mean of its divisors is an integer number (38669413).

Almost surely, 2^154425121 is an apocalyptic number.

It is an amenable number.

154425121 is a deficient number, since it is larger than the sum of its proper divisors (252531).

154425121 is an equidigital number, since it uses as much as digits as its factorization.

154425121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252530.

The product of its digits is 1600, while the sum is 25.

The square root of 154425121 is about 12426.7904544979. The cubic root of 154425121 is about 536.5036118885.

Adding to 154425121 its reverse (121524451), we get a palindrome (275949572).

The spelling of 154425121 in words is "one hundred fifty-four million, four hundred twenty-five thousand, one hundred twenty-one".