1127161581 has 32 divisors (see below), whose sum is σ = 1909383168. Its totient is φ = 575363520.

The previous prime is 1127161571. The next prime is 1127161583. The reversal of 1127161581 is 1851617211.

It is not a de Polignac number, because 1127161581 - 2⁶ = 1127161517 is a prime.

It is a super-2 number, since 2×1127161581² = 2540986459364839122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1127161583) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58131 + ... + 75056.

It is an arithmetic number, because the mean of its divisors is an integer number (59668224).

Almost surely, 2^1127161581 is an apocalyptic number.

It is an amenable number.

1127161581 is a deficient number, since it is larger than the sum of its proper divisors (782221587).

1127161581 is a wasteful number, since it uses less digits than its factorization.

1127161581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133241.

The product of its digits is 3360, while the sum is 33.

The square root of 1127161581 is about 33573.2271460460. The cubic root of 1127161581 is about 1040.7075993810.

Adding to 1127161581 its reverse (1851617211), we get a palindrome (2978778792).

The spelling of 1127161581 in words is "one billion, one hundred twenty-seven million, one hundred sixty-one thousand, five hundred eighty-one".