154140321 has 4 divisors (see below), whose sum is σ = 205520432. Its totient is φ = 102760212.

The previous prime is 154140263. The next prime is 154140341. The reversal of 154140321 is 123041451.

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 not a de Polignac number, because 154140321 - 2¹⁸ = 153878177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154140341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25690051 + ... + 25690056.

It is an arithmetic number, because the mean of its divisors is an integer number (51380108).

Almost surely, 2^154140321 is an apocalyptic number.

It is an amenable number.

154140321 is a deficient number, since it is larger than the sum of its proper divisors (51380111).

154140321 is an equidigital number, since it uses as much as digits as its factorization.

154140321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51380110.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 154140321 is about 12415.3260529074. The cubic root of 154140321 is about 536.1735916258.

Adding to 154140321 its reverse (123041451), we get a palindrome (277181772).

The spelling of 154140321 in words is "one hundred fifty-four million, one hundred forty thousand, three hundred twenty-one".