1206541057 has 2 divisors, whose sum is σ = 1206541058. Its totient is φ = 1206541056.

The previous prime is 1206541031. The next prime is 1206541109. The reversal of 1206541057 is 7501456021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1205408961 + 1132096 = 34719^2 + 1064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1206541057 - 2¹⁹ = 1206016769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1206544057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603270528 + 603270529.

It is an arithmetic number, because the mean of its divisors is an integer number (603270529).

Almost surely, 2^1206541057 is an apocalyptic number.

It is an amenable number.

1206541057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206541057 is an equidigital number, since it uses as much as digits as its factorization.

1206541057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 1206541057 is about 34735.2998691533. The cubic root of 1206541057 is about 1064.5858799748.

Adding to 1206541057 its reverse (7501456021), we get a palindrome (8707997078).

The spelling of 1206541057 in words is "one billion, two hundred six million, five hundred forty-one thousand, fifty-seven".