152840321 has 4 divisors (see below), whose sum is σ = 152865072. Its totient is φ = 152815572.

The previous prime is 152840279. The next prime is 152840327. The reversal of 152840321 is 123048251.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 152840321 - 2¹⁸ = 152578177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152840327) 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, 5366 + ... + 18288.

It is an arithmetic number, because the mean of its divisors is an integer number (38216268).

Almost surely, 2^152840321 is an apocalyptic number.

It is an amenable number.

152840321 is a deficient number, since it is larger than the sum of its proper divisors (24751).

152840321 is a wasteful number, since it uses less digits than its factorization.

152840321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24750.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 152840321 is about 12362.8605508596. The cubic root of 152840321 is about 534.6619939680.

Adding to 152840321 its reverse (123048251), we get a palindrome (275888572).

The spelling of 152840321 in words is "one hundred fifty-two million, eight hundred forty thousand, three hundred twenty-one".