1284764057 has 2 divisors, whose sum is σ = 1284764058. Its totient is φ = 1284764056.

The previous prime is 1284764027. The next prime is 1284764083. The reversal of 1284764057 is 7504674821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 762367321 + 522396736 = 27611^2 + 22856^2 .

It is a cyclic number.

It is not a de Polignac number, because 1284764057 - 2⁸ = 1284763801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1284763999 and 1284764017.

It is not a weakly prime, because it can be changed into another prime (1284764027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642382028 + 642382029.

It is an arithmetic number, because the mean of its divisors is an integer number (642382029).

Almost surely, 2^1284764057 is an apocalyptic number.

It is an amenable number.

1284764057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284764057 is an equidigital number, since it uses as much as digits as its factorization.

1284764057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 376320, while the sum is 44.

The square root of 1284764057 is about 35843.6055245563. The cubic root of 1284764057 is about 1087.1124247453.

The spelling of 1284764057 in words is "one billion, two hundred eighty-four million, seven hundred sixty-four thousand, fifty-seven".