154560121 has 4 divisors (see below), whose sum is σ = 154672000. Its totient is φ = 154448244.

The previous prime is 154560097. The next prime is 154560149. The reversal of 154560121 is 121065451.

It is a happy number.

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: 121065451 = 13 ⋅9312727.

It is a cyclic number.

It is not a de Polignac number, because 154560121 - 2¹⁷ = 154429049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154560181) 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, 53841 + ... + 56638.

It is an arithmetic number, because the mean of its divisors is an integer number (38668000).

Almost surely, 2^154560121 is an apocalyptic number.

It is an amenable number.

154560121 is a deficient number, since it is larger than the sum of its proper divisors (111879).

154560121 is a wasteful number, since it uses less digits than its factorization.

154560121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111878.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 154560121 is about 12432.2210807241. The cubic root of 154560121 is about 536.6599053111.

The spelling of 154560121 in words is "one hundred fifty-four million, five hundred sixty thousand, one hundred twenty-one".