1012780057 has 2 divisors, whose sum is σ = 1012780058. Its totient is φ = 1012780056.

The previous prime is 1012780037. The next prime is 1012780061. The reversal of 1012780057 is 7500872101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 950858896 + 61921161 = 30836^2 + 7869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012780057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1012780037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506390028 + 506390029.

It is an arithmetic number, because the mean of its divisors is an integer number (506390029).

Almost surely, 2^1012780057 is an apocalyptic number.

It is an amenable number.

1012780057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012780057 is an equidigital number, since it uses as much as digits as its factorization.

1012780057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 1012780057 is about 31824.2055203268. The cubic root of 1012780057 is about 1004.2419990002.

The spelling of 1012780057 in words is "one billion, twelve million, seven hundred eighty thousand, fifty-seven".