1171274013 has 80 divisors (see below), whose sum is σ = 2171680896. Its totient is φ = 612593280.

The previous prime is 1171274009. The next prime is 1171274017. The reversal of 1171274013 is 3104721711.

It is an interprime number because it is at equal distance from previous prime (1171274009) and next prime (1171274017).

It is not a de Polignac number, because 1171274013 - 2² = 1171274009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171274017) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 964995 + ... + 966207.

Almost surely, 2^1171274013 is an apocalyptic number.

1171274013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1171274013 is a deficient number, since it is larger than the sum of its proper divisors (1000406883).

1171274013 is a wasteful number, since it uses less digits than its factorization.

1171274013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376 (or 1367 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 1171274013 is about 34223.8807413771. The cubic root of 1171274013 is about 1054.1105725183.

Adding to 1171274013 its reverse (3104721711), we get a palindrome (4275995724).

The spelling of 1171274013 in words is "one billion, one hundred seventy-one million, two hundred seventy-four thousand, thirteen".