1442890 has 8 divisors (see below), whose sum is σ = 2597220. Its totient is φ = 577152.

The previous prime is 1442887. The next prime is 1442899. The reversal of 1442890 is 982441.

It can be written as a sum of positive squares in 2 ways, for example, as 1283689 + 159201 = 1133^2 + 399^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1442899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72135 + ... + 72154.

2^1442890 is an apocalyptic number.

1442890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1442890 is a deficient number, since it is larger than the sum of its proper divisors (1154330).

1442890 is a wasteful number, since it uses less digits than its factorization.

1442890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144296.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1442890 is about 1201.2035630983. The cubic root of 1442890 is about 112.9998172655. Note that the first 3 decimals are identical.

It can be divided in two parts, 1442 and 890, that added together give a palindrome (2332).

The spelling of 1442890 in words is "one million, four hundred forty-two thousand, eight hundred ninety".