154431121 has 8 divisors (see below), whose sum is σ = 167958504. Its totient is φ = 141139200.

The previous prime is 154431097. The next prime is 154431127. The reversal of 154431121 is 121134451.

It can be written as a sum of positive squares in 4 ways, for example, as 1661521 + 152769600 = 1289^2 + 12360^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 154431121 - 2⁵ = 154431089 is a prime.

It is a super-2 number, since 2×154431121² = 47697942266633282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154431092 and 154431101.

It is not an unprimeable number, because it can be changed into a prime (154431127) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 57496 + ... + 60121.

It is an arithmetic number, because the mean of its divisors is an integer number (20994813).

Almost surely, 2^154431121 is an apocalyptic number.

It is an amenable number.

154431121 is a deficient number, since it is larger than the sum of its proper divisors (13527383).

154431121 is a wasteful number, since it uses less digits than its factorization.

154431121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117731.

The product of its digits is 480, while the sum is 22.

The square root of 154431121 is about 12427.0318660572. The cubic root of 154431121 is about 536.5105601967.

Adding to 154431121 its reverse (121134451), we get a palindrome (275565572).

The spelling of 154431121 in words is "one hundred fifty-four million, four hundred thirty-one thousand, one hundred twenty-one".