1442781 has 6 divisors (see below), whose sum is σ = 2084030. Its totient is φ = 961848.

The previous prime is 1442743. The next prime is 1442783. The reversal of 1442781 is 1872441.

It can be written as a sum of positive squares in only one way, i.e., 1232100 + 210681 = 1110^2 + 459^2 .

It is not a de Polignac number, because 1442781 - 2⁶ = 1442717 is a prime.

It is a super-2 number, since 2×1442781² = 4163234027922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80146 + ... + 80163.

2^1442781 is an apocalyptic number.

It is an amenable number.

1442781 is a deficient number, since it is larger than the sum of its proper divisors (641249).

1442781 is a wasteful number, since it uses less digits than its factorization.

1442781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160315 (or 160312 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 1442781 is about 1201.1581910806. The cubic root of 1442781 is about 112.9969717517.

The spelling of 1442781 in words is "one million, four hundred forty-two thousand, seven hundred eighty-one".