154521242 has 8 divisors (see below), whose sum is σ = 236713536. Its totient is φ = 75616732.

The previous prime is 154521239. The next prime is 154521277. The reversal of 154521242 is 242125451.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821828 + ... + 822015.

It is an arithmetic number, because the mean of its divisors is an integer number (29589192).

Almost surely, 2^154521242 is an apocalyptic number.

154521242 is a deficient number, since it is larger than the sum of its proper divisors (82192294).

154521242 is a wasteful number, since it uses less digits than its factorization.

154521242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643892.

The product of its digits is 3200, while the sum is 26.

The square root of 154521242 is about 12430.6573438415. The cubic root of 154521242 is about 536.6149032971.

Adding to 154521242 its reverse (242125451), we get a palindrome (396646693).

The spelling of 154521242 in words is "one hundred fifty-four million, five hundred twenty-one thousand, two hundred forty-two".