1520003 has 2 divisors, whose sum is σ = 1520004. Its totient is φ = 1520002.

The previous prime is 1519967. The next prime is 1520009. The reversal of 1520003 is 3000251.

It is a strong prime.

It is an emirp because it is prime and its reverse (3000251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1520003 - 2⁶ = 1519939 is a prime.

It is not a weakly prime, because it can be changed into another prime (1520009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760001 + 760002.

It is an arithmetic number, because the mean of its divisors is an integer number (760002).

2^1520003 is an apocalyptic number.

1520003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520003 is an equidigital number, since it uses as much as digits as its factorization.

1520003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 1520003 is about 1232.8840172539. The cubic root of 1520003 is about 114.9780172222.

Adding to 1520003 its reverse (3000251), we get a palindrome (4520254).

The spelling of 1520003 in words is "one million, five hundred twenty thousand, three".