1263166057 has 2 divisors, whose sum is σ = 1263166058. Its totient is φ = 1263166056.

The previous prime is 1263166043. The next prime is 1263166081. The reversal of 1263166057 is 7506613621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 823173481 + 439992576 = 28691^2 + 20976^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263166057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1263166027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631583028 + 631583029.

It is an arithmetic number, because the mean of its divisors is an integer number (631583029).

Almost surely, 2^1263166057 is an apocalyptic number.

It is an amenable number.

1263166057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263166057 is an equidigital number, since it uses as much as digits as its factorization.

1263166057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 1263166057 is about 35541.0474944113. The cubic root of 1263166057 is about 1080.9861982336.

Adding to 1263166057 its reverse (7506613621), we get a palindrome (8769779678).

The spelling of 1263166057 in words is "one billion, two hundred sixty-three million, one hundred sixty-six thousand, fifty-seven".