154012321 has 2 divisors, whose sum is σ = 154012322. Its totient is φ = 154012320.

The previous prime is 154012319. The next prime is 154012337. The reversal of 154012321 is 123210451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115261696 + 38750625 = 10736^2 + 6225^2 .

It is a cyclic number.

It is not a de Polignac number, because 154012321 - 2¹ = 154012319 is a prime.

Together with 154012319, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (154012021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77006160 + 77006161.

It is an arithmetic number, because the mean of its divisors is an integer number (77006161).

Almost surely, 2^154012321 is an apocalyptic number.

It is an amenable number.

154012321 is a deficient number, since it is larger than the sum of its proper divisors (1).

154012321 is an equidigital number, since it uses as much as digits as its factorization.

154012321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 154012321 is about 12410.1700632989. The cubic root of 154012321 is about 536.0251354980.

Adding to 154012321 its reverse (123210451), we get a palindrome (277222772).

It can be divided in two parts, 1540 and 12321, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 154012321 in words is "one hundred fifty-four million, twelve thousand, three hundred twenty-one".