1523503 has 2 divisors, whose sum is σ = 1523504. Its totient is φ = 1523502.

The previous prime is 1523491. The next prime is 1523507. The reversal of 1523503 is 3053251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1523503 - 2¹⁷ = 1392431 is a prime.

It is a super-2 number, since 2×1523503² = 4642122782018, which contains 22 as substring.

It is equal to p₁₁₅₈₂₂ and since 1523503 and 115822 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1523507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761751 + 761752.

It is an arithmetic number, because the mean of its divisors is an integer number (761752).

2^1523503 is an apocalyptic number.

1523503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1523503 is an equidigital number, since it uses as much as digits as its factorization.

1523503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 1523503 is about 1234.3026371194. The cubic root of 1523503 is about 115.0662000697.

Adding to 1523503 its reverse (3053251), we get a palindrome (4576754).

It can be divided in two parts, 152 and 3503, that added together give a triangular number (3655 = T₈₅).

The spelling of 1523503 in words is "one million, five hundred twenty-three thousand, five hundred three".