1545001121 has 4 divisors (see below), whose sum is σ = 1545336000. Its totient is φ = 1544666244.

The previous prime is 1545001111. The next prime is 1545001151. The reversal of 1545001121 is 1211005451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1545001121 - 2³⁰ = 471259297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1545001093 and 1545001102.

It is not an unprimeable number, because it can be changed into a prime (1545001111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160421 + ... + 169778.

It is an arithmetic number, because the mean of its divisors is an integer number (386334000).

Almost surely, 2^1545001121 is an apocalyptic number.

It is an amenable number.

1545001121 is a deficient number, since it is larger than the sum of its proper divisors (334879).

1545001121 is an equidigital number, since it uses as much as digits as its factorization.

1545001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334878.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1545001121 is about 39306.5022737969. The cubic root of 1545001121 is about 1156.0490636715.

Adding to 1545001121 its reverse (1211005451), we get a palindrome (2756006572).

The spelling of 1545001121 in words is "one billion, five hundred forty-five million, one thousand, one hundred twenty-one".