1520503 has 2 divisors, whose sum is σ = 1520504. Its totient is φ = 1520502.

The previous prime is 1520501. The next prime is 1520509. The reversal of 1520503 is 3050251.

It is a weak prime.

It is an emirp because it is prime and its reverse (3050251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1520503 - 2¹ = 1520501 is a prime.

Together with 1520501, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1520501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760251 + 760252.

It is an arithmetic number, because the mean of its divisors is an integer number (760252).

2^1520503 is an apocalyptic number.

1520503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520503 is an equidigital number, since it uses as much as digits as its factorization.

1520503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 1520503 is about 1233.0867771572. The cubic root of 1520503 is about 114.9906230540.

Adding to 1520503 its reverse (3050251), we get a palindrome (4570754).

The spelling of 1520503 in words is "one million, five hundred twenty thousand, five hundred three".