1563542 has 4 divisors (see below), whose sum is σ = 2345316. Its totient is φ = 781770.

The previous prime is 1563539. The next prime is 1563571. The reversal of 1563542 is 2453651.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390884 + ... + 390887.

It is an arithmetic number, because the mean of its divisors is an integer number (586329).

2^1563542 is an apocalyptic number.

1563542 is a deficient number, since it is larger than the sum of its proper divisors (781774).

1563542 is an equidigital number, since it uses as much as digits as its factorization.

1563542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781773.

The product of its digits is 3600, while the sum is 26.

The square root of 1563542 is about 1250.4167305343. The cubic root of 1563542 is about 116.0655099648.

The spelling of 1563542 in words is "one million, five hundred sixty-three thousand, five hundred forty-two".