1020494 has 4 divisors (see below), whose sum is σ = 1530744. Its totient is φ = 510246.

The previous prime is 1020491. The next prime is 1020517. The reversal of 1020494 is 4940201.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020491) 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 as a sum of consecutive naturals, namely, 255122 + ... + 255125.

It is an arithmetic number, because the mean of its divisors is an integer number (382686).

2^1020494 is an apocalyptic number.

1020494 is a deficient number, since it is larger than the sum of its proper divisors (510250).

1020494 is an equidigital number, since it uses as much as digits as its factorization.

1020494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510249.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1020494 is about 1010.1950306748. The cubic root of 1020494 is about 100.6785190397.

Adding to 1020494 its reverse (4940201), we get a palindrome (5960695).

The spelling of 1020494 in words is "one million, twenty thousand, four hundred ninety-four".