1021490 has 8 divisors (see below), whose sum is σ = 1838700. Its totient is φ = 408592.

The previous prime is 1021487. The next prime is 1021541. The reversal of 1021490 is 941201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 923521 + 97969 = 961^2 + 313^2 .

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

It is a Curzon number.

It is a nialpdrome in base 16.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 51065 + ... + 51084.

2^1021490 is an apocalyptic number.

1021490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021490 is a deficient number, since it is larger than the sum of its proper divisors (817210).

1021490 is a wasteful number, since it uses less digits than its factorization.

1021490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102156.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1021490 is about 1010.6878845618. The cubic root of 1021490 is about 100.7112623972.

Adding to 1021490 its reverse (941201), we get a palindrome (1962691).

The spelling of 1021490 in words is "one million, twenty-one thousand, four hundred ninety".