1245563 has 4 divisors (see below), whose sum is σ = 1358808. Its totient is φ = 1132320.

The previous prime is 1245557. The next prime is 1245589. The reversal of 1245563 is 3655421.

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

It is a cyclic number.

It is not a de Polignac number, because 1245563 - 2¹² = 1241467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1245763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56606 + ... + 56627.

It is an arithmetic number, because the mean of its divisors is an integer number (339702).

2^1245563 is an apocalyptic number.

1245563 is a deficient number, since it is larger than the sum of its proper divisors (113245).

1245563 is a wasteful number, since it uses less digits than its factorization.

1245563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113244.

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

The square root of 1245563 is about 1116.0479380385. The cubic root of 1245563 is about 107.5941270409.

The spelling of 1245563 in words is "one million, two hundred forty-five thousand, five hundred sixty-three".