1442406 has 32 divisors (see below), whose sum is σ = 3356928. Its totient is φ = 404640.

The previous prime is 1442393. The next prime is 1442411. The reversal of 1442406 is 6042441.

1442406 = 599² + 600² + ... + 602².

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2281 + ... + 2843.

It is an arithmetic number, because the mean of its divisors is an integer number (104904).

2^1442406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1442406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1678464).

1442406 is an abundant number, since it is smaller than the sum of its proper divisors (1914522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1442406 is a wasteful number, since it uses less digits than its factorization.

1442406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1442406 is about 1201.0020815969. The cubic root of 1442406 is about 112.9871810451.

1442406 divided by its sum of digits (21) gives a palindrome (68686).

Adding to 1442406 its reverse (6042441), we get a palindrome (7484847).

The spelling of 1442406 in words is "one million, four hundred forty-two thousand, four hundred six".