1523563 has 2 divisors, whose sum is σ = 1523564. Its totient is φ = 1523562.

The previous prime is 1523551. The next prime is 1523567. The reversal of 1523563 is 3653251.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1523563 - 2⁵ = 1523531 is a prime.

It is not a weakly prime, because it can be changed into another prime (1523567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761781 + 761782.

It is an arithmetic number, because the mean of its divisors is an integer number (761782).

2^1523563 is an apocalyptic number.

1523563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1523563 is an equidigital number, since it uses as much as digits as its factorization.

1523563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 25.

The square root of 1523563 is about 1234.3269421025. The cubic root of 1523563 is about 115.0677105976.

It can be divided in two parts, 15235 and 63, that multiplied together give a triangular number (959805 = T₁₃₈₅).

The spelling of 1523563 in words is "one million, five hundred twenty-three thousand, five hundred sixty-three".