1520012005 has 4 divisors (see below), whose sum is σ = 1824014412. Its totient is φ = 1216009600.

The previous prime is 1520011991. The next prime is 1520012029. The reversal of 1520012005 is 5002100251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5002100251 = 499 ⋅10024249.

It can be written as a sum of positive squares in 2 ways, for example, as 963854116 + 556157889 = 31046^2 + 23583^2 .

It is not a de Polignac number, because 1520012005 - 2¹⁷ = 1519880933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1520012005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152001196 + ... + 152001205.

It is an arithmetic number, because the mean of its divisors is an integer number (456003603).

Almost surely, 2^1520012005 is an apocalyptic number.

It is an amenable number.

1520012005 is a deficient number, since it is larger than the sum of its proper divisors (304002407).

1520012005 is an equidigital number, since it uses as much as digits as its factorization.

1520012005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304002406.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1520012005 is about 38987.3313398083. The cubic root of 1520012005 is about 1149.7824427770.

Adding to 1520012005 its reverse (5002100251), we get a palindrome (6522112256).

The spelling of 1520012005 in words is "one billion, five hundred twenty million, twelve thousand, five".