1240563 has 4 divisors (see below), whose sum is σ = 1654088. Its totient is φ = 827040.

The previous prime is 1240559. The next prime is 1240607. The reversal of 1240563 is 3650421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3650421 = 3 ⋅1216807.

It is not a de Polignac number, because 1240563 - 2² = 1240559 is a prime.

It is a D-number.

It is a Duffinian number.

1240563 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1240523) 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, 206758 + ... + 206763.

It is an arithmetic number, because the mean of its divisors is an integer number (413522).

2^1240563 is an apocalyptic number.

1240563 is a deficient number, since it is larger than the sum of its proper divisors (413525).

1240563 is an equidigital number, since it uses as much as digits as its factorization.

1240563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413524.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1240563 is about 1113.8056383409. The cubic root of 1240563 is about 107.4499640950.

Adding to 1240563 its reverse (3650421), we get a palindrome (4890984).

The spelling of 1240563 in words is "one million, two hundred forty thousand, five hundred sixty-three".