1012840 has 16 divisors (see below), whose sum is σ = 2278980. Its totient is φ = 405120.

The previous prime is 1012831. The next prime is 1012861. The reversal of 1012840 is 482101.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1004004 + 8836 = 1002^2 + 94^2 .

It is an Ulam number.

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, 12621 + ... + 12700.

2^1012840 is an apocalyptic number.

1012840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012840 is an abundant number, since it is smaller than the sum of its proper divisors (1266140).

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

1012840 is a wasteful number, since it uses less digits than its factorization.

1012840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25332 (or 25328 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1012840 is about 1006.3995230524. The cubic root of 1012840 is about 100.4261811163.

Adding to 1012840 its reverse (482101), we get a palindrome (1494941).

The spelling of 1012840 in words is "one million, twelve thousand, eight hundred forty".