1036781 has 4 divisors (see below), whose sum is σ = 1039872. Its totient is φ = 1033692.

The previous prime is 1036769. The next prime is 1036787. The reversal of 1036781 is 1876301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1876301 = 7 ⋅268043.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1036781 is a prime.

It is a super-2 number, since 2×1036781² = 2149829683922, 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 Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1036781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1036787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 971 + ... + 1736.

It is an arithmetic number, because the mean of its divisors is an integer number (259968).

2^1036781 is an apocalyptic number.

It is an amenable number.

1036781 is a deficient number, since it is larger than the sum of its proper divisors (3091).

1036781 is an equidigital number, since it uses as much as digits as its factorization.

1036781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1036781 is about 1018.2244349847. The cubic root of 1036781 is about 101.2113015755.

The spelling of 1036781 in words is "one million, thirty-six thousand, seven hundred eighty-one".