154521321 has 8 divisors (see below), whose sum is σ = 208029120. Its totient is φ = 102013872.

The previous prime is 154521299. The next prime is 154521331. The reversal of 154521321 is 123125451.

It is a happy number.

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

It is not a de Polignac number, because 154521321 - 2¹³ = 154513129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 154521291 and 154521300.

It is not an unprimeable number, because it can be changed into a prime (154521331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249726 + ... + 250343.

It is an arithmetic number, because the mean of its divisors is an integer number (26003640).

Almost surely, 2^154521321 is an apocalyptic number.

It is an amenable number.

154521321 is a deficient number, since it is larger than the sum of its proper divisors (53507799).

154521321 is a wasteful number, since it uses less digits than its factorization.

154521321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500175.

The product of its digits is 1200, while the sum is 24.

The square root of 154521321 is about 12430.6605214687. The cubic root of 154521321 is about 536.6149947464.

Adding to 154521321 its reverse (123125451), we get a palindrome (277646772).

The spelling of 154521321 in words is "one hundred fifty-four million, five hundred twenty-one thousand, three hundred twenty-one".