1242566 has 8 divisors (see below), whose sum is σ = 2007264. Its totient is φ = 573480.

The previous prime is 1242517. The next prime is 1242569. The reversal of 1242566 is 6652421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 47791 = 1242566 / (1 + 2 + 4 + 2 + 5 + 6 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242569) 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, 23870 + ... + 23921.

It is an arithmetic number, because the mean of its divisors is an integer number (250908).

2^1242566 is an apocalyptic number.

1242566 is a deficient number, since it is larger than the sum of its proper divisors (764698).

1242566 is a wasteful number, since it uses less digits than its factorization.

1242566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47806.

The product of its digits is 2880, while the sum is 26.

The square root of 1242566 is about 1114.7044451333. The cubic root of 1242566 is about 107.5077621941.

Adding to 1242566 its reverse (6652421), we get a palindrome (7894987).

The spelling of 1242566 in words is "one million, two hundred forty-two thousand, five hundred sixty-six".