1206255161 has 2 divisors, whose sum is σ = 1206255162. Its totient is φ = 1206255160.

The previous prime is 1206255151. The next prime is 1206255209. The reversal of 1206255161 is 1615526021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 914699536 + 291555625 = 30244^2 + 17075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1206255161 - 2⁶ = 1206255097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1206255131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603127580 + 603127581.

It is an arithmetic number, because the mean of its divisors is an integer number (603127581).

Almost surely, 2^1206255161 is an apocalyptic number.

It is an amenable number.

1206255161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206255161 is an equidigital number, since it uses as much as digits as its factorization.

1206255161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1206255161 is about 34731.1842729268. The cubic root of 1206255161 is about 1064.5017869979.

The spelling of 1206255161 in words is "one billion, two hundred six million, two hundred fifty-five thousand, one hundred sixty-one".