1172906071 has 4 divisors (see below), whose sum is σ = 1173523032. Its totient is φ = 1172289112.

The previous prime is 1172906057. The next prime is 1172906159. The reversal of 1172906071 is 1706092711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1172906071 - 2²⁵ = 1139351639 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 (1172906671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305620 + ... + 309433.

It is an arithmetic number, because the mean of its divisors is an integer number (293380758).

Almost surely, 2^1172906071 is an apocalyptic number.

1172906071 is a deficient number, since it is larger than the sum of its proper divisors (616961).

1172906071 is an equidigital number, since it uses as much as digits as its factorization.

1172906071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616960.

The product of its (nonzero) digits is 5292, while the sum is 34.

The square root of 1172906071 is about 34247.7162888272. The cubic root of 1172906071 is about 1054.5999459512.

Adding to 1172906071 its reverse (1706092711), we get a palindrome (2878998782).

The spelling of 1172906071 in words is "one billion, one hundred seventy-two million, nine hundred six thousand, seventy-one".