1545154421 has 24 divisors (see below), whose sum is σ = 1698744960. Its totient is φ = 1402246560.

The previous prime is 1545154411. The next prime is 1545154433. The reversal of 1545154421 is 1244515451.

It is a happy number.

It is not a de Polignac number, because 1545154421 - 2⁶ = 1545154357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1545154411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1170800 + ... + 1172118.

It is an arithmetic number, because the mean of its divisors is an integer number (70781040).

Almost surely, 2^1545154421 is an apocalyptic number.

It is an amenable number.

1545154421 is a deficient number, since it is larger than the sum of its proper divisors (153590539).

1545154421 is a wasteful number, since it uses less digits than its factorization.

1545154421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457 (or 1426 counting only the distinct ones).

The product of its digits is 16000, while the sum is 32.

The square root of 1545154421 is about 39308.4522844642. The cubic root of 1545154421 is about 1156.0872980473.

Adding to 1545154421 its reverse (1244515451), we get a palindrome (2789669872).

The spelling of 1545154421 in words is "one billion, five hundred forty-five million, one hundred fifty-four thousand, four hundred twenty-one".