154521441 has 12 divisors (see below), whose sum is σ = 224621332. Its totient is φ = 102357216.

The previous prime is 154521439. The next prime is 154521457. The reversal of 154521441 is 144125451.

It can be written as a sum of positive squares in 2 ways, for example, as 17139600 + 137381841 = 4140^2 + 11721^2 .

It is not a de Polignac number, because 154521441 - 2¹ = 154521439 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (154521421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53266 + ... + 56091.

Almost surely, 2^154521441 is an apocalyptic number.

It is an amenable number.

154521441 is a deficient number, since it is larger than the sum of its proper divisors (70099891).

154521441 is a wasteful number, since it uses less digits than its factorization.

154521441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109520 (or 109517 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 154521441 is about 12430.6653482426. The cubic root of 154521441 is about 536.6151336566.

Adding to 154521441 its reverse (144125451), we get a palindrome (298646892).

The spelling of 154521441 in words is "one hundred fifty-four million, five hundred twenty-one thousand, four hundred forty-one".