1042781 has 2 divisors, whose sum is σ = 1042782. Its totient is φ = 1042780.

The previous prime is 1042759. The next prime is 1042799. The reversal of 1042781 is 1872401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 931225 + 111556 = 965^2 + 334^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042781 - 2¹⁰ = 1041757 is a prime.

It is a super-2 number, since 2×1042781² = 2174784427922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521390 + 521391.

It is an arithmetic number, because the mean of its divisors is an integer number (521391).

2^1042781 is an apocalyptic number.

It is an amenable number.

1042781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042781 is an equidigital number, since it uses as much as digits as its factorization.

1042781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 1042781 is about 1021.1664898536. The cubic root of 1042781 is about 101.4061675799.

The spelling of 1042781 in words is "one million, forty-two thousand, seven hundred eighty-one".