1206557071 has 2 divisors, whose sum is σ = 1206557072. Its totient is φ = 1206557070.

The previous prime is 1206557039. The next prime is 1206557083. The reversal of 1206557071 is 1707556021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1206557071 - 2⁵ = 1206557039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1206537071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603278535 + 603278536.

It is an arithmetic number, because the mean of its divisors is an integer number (603278536).

Almost surely, 2^1206557071 is an apocalyptic number.

1206557071 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206557071 is an equidigital number, since it uses as much as digits as its factorization.

1206557071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14700, while the sum is 34.

The square root of 1206557071 is about 34735.5303831682. The cubic root of 1206557071 is about 1064.5905899134.

The spelling of 1206557071 in words is "one billion, two hundred six million, five hundred fifty-seven thousand, seventy-one".