1242567 has 8 divisors (see below), whose sum is σ = 1840880. Its totient is φ = 828360.

The previous prime is 1242517. The next prime is 1242569. The reversal of 1242567 is 7652421.

It is not a de Polignac number, because 1242567 - 2⁶ = 1242503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 46021 = 1242567 / (1 + 2 + 4 + 2 + 5 + 6 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242567.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22984 + ... + 23037.

It is an arithmetic number, because the mean of its divisors is an integer number (230110).

2^1242567 is an apocalyptic number.

1242567 is a deficient number, since it is larger than the sum of its proper divisors (598313).

1242567 is an equidigital number, since it uses as much as digits as its factorization.

1242567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46030 (or 46024 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 1242567 is about 1114.7048936826. The cubic root of 1242567 is about 107.5077910344.

Adding to 1242567 its reverse (7652421), we get a palindrome (8894988).

The spelling of 1242567 in words is "one million, two hundred forty-two thousand, five hundred sixty-seven".