1071581149 has 2 divisors, whose sum is σ = 1071581150. Its totient is φ = 1071581148.

The previous prime is 1071581143. The next prime is 1071581167. The reversal of 1071581149 is 9411851701.

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., 873616249 + 197964900 = 29557^2 + 14070^2 .

It is a cyclic number.

It is not a de Polignac number, because 1071581149 - 2¹¹ = 1071579101 is a prime.

It is a super-2 number, since 2×1071581149² = 2296572317784320402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1071581143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535790574 + 535790575.

It is an arithmetic number, because the mean of its divisors is an integer number (535790575).

Almost surely, 2^1071581149 is an apocalyptic number.

It is an amenable number.

1071581149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1071581149 is an equidigital number, since it uses as much as digits as its factorization.

1071581149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 37.

The square root of 1071581149 is about 32735.0141133313. The cubic root of 1071581149 is about 1023.3126786802.

The spelling of 1071581149 in words is "one billion, seventy-one million, five hundred eighty-one thousand, one hundred forty-nine".