1042777081 has 2 divisors, whose sum is σ = 1042777082. Its totient is φ = 1042777080.

The previous prime is 1042777069. The next prime is 1042777103. The reversal of 1042777081 is 1807772401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 811737081 + 231040000 = 28491^2 + 15200^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042777081 - 2⁹ = 1042776569 is a prime.

It is a super-2 number, since 2×1042777081² = 2174768081317761122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1042777081.

It is not a weakly prime, because it can be changed into another prime (1012777081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521388540 + 521388541.

It is an arithmetic number, because the mean of its divisors is an integer number (521388541).

Almost surely, 2^1042777081 is an apocalyptic number.

It is an amenable number.

1042777081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042777081 is an equidigital number, since it uses as much as digits as its factorization.

1042777081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21952, while the sum is 37.

The square root of 1042777081 is about 32292.0591012713. The cubic root of 1042777081 is about 1014.0604054415.

The spelling of 1042777081 in words is "one billion, forty-two million, seven hundred seventy-seven thousand, eighty-one".