1245442 has 8 divisors (see below), whose sum is σ = 2038032. Its totient is φ = 566100.

The previous prime is 1245421. The next prime is 1245449. The reversal of 1245442 is 2445421.

It is a happy number.

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

It is a super-2 number, since 2×1245442² = 3102251550728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 56611 = 1245442 / (1 + 2 + 4 + 5 + 4 + 4 + 2).

It is a d-powerful number, because it can be written as 1 + 2⁷ + 4 + 5³ + 4⁸ + 4¹⁰ + 2¹⁷ .

It is not an unprimeable number, because it can be changed into a prime (1245449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28284 + ... + 28327.

It is an arithmetic number, because the mean of its divisors is an integer number (254754).

2^1245442 is an apocalyptic number.

1245442 is a deficient number, since it is larger than the sum of its proper divisors (792590).

1245442 is a wasteful number, since it uses less digits than its factorization.

1245442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56624.

The product of its digits is 1280, while the sum is 22.

The square root of 1245442 is about 1115.9937275809. The cubic root of 1245442 is about 107.5906428572.

It can be divided in two parts, 12 and 45442, that added together give a palindrome (45454).

The spelling of 1245442 in words is "one million, two hundred forty-five thousand, four hundred forty-two".