1605155141 has 2 divisors, whose sum is σ = 1605155142. Its totient is φ = 1605155140.

The previous prime is 1605155129. The next prime is 1605155143. The reversal of 1605155141 is 1415515061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1468499041 + 136656100 = 38321^2 + 11690^2 .

It is a cyclic number.

It is not a de Polignac number, because 1605155141 - 2⁶ = 1605155077 is a prime.

Together with 1605155143, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1605155143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802577570 + 802577571.

It is an arithmetic number, because the mean of its divisors is an integer number (802577571).

Almost surely, 2^1605155141 is an apocalyptic number.

It is an amenable number.

1605155141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605155141 is an equidigital number, since it uses as much as digits as its factorization.

1605155141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 29.

The square root of 1605155141 is about 40064.3874407185. The cubic root of 1605155141 is about 1170.8618922559.

The spelling of 1605155141 in words is "one billion, six hundred five million, one hundred fifty-five thousand, one hundred forty-one".