1563239 has 2 divisors, whose sum is σ = 1563240. Its totient is φ = 1563238.

The previous prime is 1563229. The next prime is 1563253. The reversal of 1563239 is 9323651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1563239 - 2⁸ = 1562983 is a prime.

It is a super-2 number, since 2×1563239² = 4887432342242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1563209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 781619 + 781620.

It is an arithmetic number, because the mean of its divisors is an integer number (781620).

2^1563239 is an apocalyptic number.

1563239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1563239 is an equidigital number, since it uses as much as digits as its factorization.

1563239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 29.

The square root of 1563239 is about 1250.2955650565. The cubic root of 1563239 is about 116.0580120057.

The spelling of 1563239 in words is "one million, five hundred sixty-three thousand, two hundred thirty-nine".