1071381161 has 2 divisors, whose sum is σ = 1071381162. Its totient is φ = 1071381160.

The previous prime is 1071381119. The next prime is 1071381169. The reversal of 1071381161 is 1611831701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1061521561 + 9859600 = 32581^2 + 3140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1071381161 is a prime.

It is a super-2 number, since 2×1071381161² = 2295715184291415842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1071381169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535690580 + 535690581.

It is an arithmetic number, because the mean of its divisors is an integer number (535690581).

Almost surely, 2^1071381161 is an apocalyptic number.

It is an amenable number.

1071381161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1071381161 is an equidigital number, since it uses as much as digits as its factorization.

1071381161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 1071381161 is about 32731.9593211283. The cubic root of 1071381161 is about 1023.2490148165.

The spelling of 1071381161 in words is "one billion, seventy-one million, three hundred eighty-one thousand, one hundred sixty-one".