1146781 has 2 divisors, whose sum is σ = 1146782. Its totient is φ = 1146780.

The previous prime is 1146779. The next prime is 1146787. The reversal of 1146781 is 1876411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 54756 = 1045^2 + 234^2 .

It is a cyclic number.

It is not a de Polignac number, because 1146781 - 2¹ = 1146779 is a prime.

It is a super-2 number, since 2×1146781² = 2630213323922, which contains 22 as substring.

Together with 1146779, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1146787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573390 + 573391.

It is an arithmetic number, because the mean of its divisors is an integer number (573391).

2^1146781 is an apocalyptic number.

It is an amenable number.

1146781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1146781 is an equidigital number, since it uses as much as digits as its factorization.

1146781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 28.

The square root of 1146781 is about 1070.8786112347. The cubic root of 1146781 is about 104.6711099759.

The spelling of 1146781 in words is "one million, one hundred forty-six thousand, seven hundred eighty-one".