1012781 has 12 divisors (see below), whose sum is σ = 1285920. Its totient is φ = 788760.

The previous prime is 1012771. The next prime is 1012789. The reversal of 1012781 is 1872101.

It is not a de Polignac number, because 1012781 - 2⁶ = 1012717 is a prime.

It is a super-2 number, since 2×1012781² = 2051450707922, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 401 + ... + 1478.

It is an arithmetic number, because the mean of its divisors is an integer number (107160).

2^1012781 is an apocalyptic number.

1012781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012781 is a deficient number, since it is larger than the sum of its proper divisors (273139).

1012781 is a wasteful number, since it uses less digits than its factorization.

1012781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904 (or 1897 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 1012781 is about 1006.3702102109. The cubic root of 1012781 is about 100.4242310683.

Adding to 1012781 its reverse (1872101), we get a palindrome (2884882).

It can be divided in two parts, 101 and 2781, that added together give a palindrome (2882).

The spelling of 1012781 in words is "one million, twelve thousand, seven hundred eighty-one".