154641421 has 8 divisors (see below), whose sum is σ = 172289664. Its totient is φ = 137591520.

The previous prime is 154641407. The next prime is 154641433. The reversal of 154641421 is 124146451.

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

It is not a de Polignac number, because 154641421 - 2¹⁹ = 154117133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 154641421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154641481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149040 + ... + 150073.

It is an arithmetic number, because the mean of its divisors is an integer number (21536208).

Almost surely, 2^154641421 is an apocalyptic number.

154641421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

154641421 is a deficient number, since it is larger than the sum of its proper divisors (17648243).

154641421 is a wasteful number, since it uses less digits than its factorization.

154641421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299171.

The product of its digits is 3840, while the sum is 28.

The square root of 154641421 is about 12435.4903803590. The cubic root of 154641421 is about 536.7539847806.

Adding to 154641421 its reverse (124146451), we get a palindrome (278787872).

The spelling of 154641421 in words is "one hundred fifty-four million, six hundred forty-one thousand, four hundred twenty-one".