1171026157 has 24 divisors (see below), whose sum is σ = 1378156032. Its totient is φ = 992073600.

The previous prime is 1171026151. The next prime is 1171026191. The reversal of 1171026157 is 7516201711.

It is a happy number.

It is not a de Polignac number, because 1171026157 - 2¹¹ = 1171024109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171026151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1974453 + ... + 1975045.

It is an arithmetic number, because the mean of its divisors is an integer number (57423168).

Almost surely, 2^1171026157 is an apocalyptic number.

It is an amenable number.

1171026157 is a deficient number, since it is larger than the sum of its proper divisors (207129875).

1171026157 is a wasteful number, since it uses less digits than its factorization.

1171026157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009 (or 1002 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 31.

The square root of 1171026157 is about 34220.2594525524. The cubic root of 1171026157 is about 1054.0362130150.

Adding to 1171026157 its reverse (7516201711), we get a palindrome (8687227868).

The spelling of 1171026157 in words is "one billion, one hundred seventy-one million, twenty-six thousand, one hundred fifty-seven".