1520443045 has 24 divisors (see below), whose sum is σ = 2015815032. Its totient is φ = 1100077440.

The previous prime is 1520443033. The next prime is 1520443069. The reversal of 1520443045 is 5403440251.

It can be written as a sum of positive squares in 4 ways, for example, as 606045924 + 914397121 = 24618^2 + 30239^2 .

It is not a de Polignac number, because 1520443045 - 2⁵ = 1520443013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112807 + ... + 125563.

It is an arithmetic number, because the mean of its divisors is an integer number (83992293).

Almost surely, 2^1520443045 is an apocalyptic number.

It is an amenable number.

1520443045 is a deficient number, since it is larger than the sum of its proper divisors (495371987).

1520443045 is a wasteful number, since it uses less digits than its factorization.

1520443045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12981 (or 12970 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1520443045 is about 38992.8588974956. The cubic root of 1520443045 is about 1149.8911163451.

Adding to 1520443045 its reverse (5403440251), we get a palindrome (6923883296).

The spelling of 1520443045 in words is "one billion, five hundred twenty million, four hundred forty-three thousand, forty-five".