1860281161 has 2 divisors, whose sum is σ = 1860281162. Its totient is φ = 1860281160.

The previous prime is 1860281113. The next prime is 1860281167. The reversal of 1860281161 is 1611820681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1828075536 + 32205625 = 42756^2 + 5675^2 .

It is a cyclic number.

It is not a de Polignac number, because 1860281161 - 2⁹ = 1860280649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1860281167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 930140580 + 930140581.

It is an arithmetic number, because the mean of its divisors is an integer number (930140581).

Almost surely, 2^1860281161 is an apocalyptic number.

It is an amenable number.

1860281161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1860281161 is an equidigital number, since it uses as much as digits as its factorization.

1860281161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 1860281161 is about 43130.9768148137. The cubic root of 1860281161 is about 1229.8709100648.

The spelling of 1860281161 in words is "one billion, eight hundred sixty million, two hundred eighty-one thousand, one hundred sixty-one".