1520006045 has 4 divisors (see below), whose sum is σ = 1824007260. Its totient is φ = 1216004832.

The previous prime is 1520006041. The next prime is 1520006069. The reversal of 1520006045 is 5406000251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5406000251 = 19 ⋅284526329.

It can be written as a sum of positive squares in 2 ways, for example, as 1131245956 + 388760089 = 33634^2 + 19717^2 .

It is a cyclic number.

It is not a de Polignac number, because 1520006045 - 2² = 1520006041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1520006045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520006041) 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, 152000600 + ... + 152000609.

It is an arithmetic number, because the mean of its divisors is an integer number (456001815).

Almost surely, 2^1520006045 is an apocalyptic number.

It is an amenable number.

1520006045 is a deficient number, since it is larger than the sum of its proper divisors (304001215).

1520006045 is an equidigital number, since it uses as much as digits as its factorization.

1520006045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304001214.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1520006045 is about 38987.2549046480. The cubic root of 1520006045 is about 1149.7809400011.

Adding to 1520006045 its reverse (5406000251), we get a palindrome (6926006296).

The spelling of 1520006045 in words is "one billion, five hundred twenty million, six thousand, forty-five".