1172134261 has 4 divisors (see below), whose sum is σ = 1173192300. Its totient is φ = 1171076224.

The previous prime is 1172134253. The next prime is 1172134321. The reversal of 1172134261 is 1624312711.

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

It can be written as a sum of positive squares in 2 ways, for example, as 302238225 + 869896036 = 17385^2 + 29494^2 .

It is a cyclic number.

It is not a de Polignac number, because 1172134261 - 2³ = 1172134253 is a prime.

It is a super-2 number, since 2×1172134261² = 2747797451620032242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172134961) 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, 527356 + ... + 529573.

It is an arithmetic number, because the mean of its divisors is an integer number (293298075).

Almost surely, 2^1172134261 is an apocalyptic number.

It is an amenable number.

1172134261 is a deficient number, since it is larger than the sum of its proper divisors (1058039).

1172134261 is a wasteful number, since it uses less digits than its factorization.

1172134261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058038.

The product of its digits is 2016, while the sum is 28.

The square root of 1172134261 is about 34236.4463839342. The cubic root of 1172134261 is about 1054.3685749418.

Adding to 1172134261 its reverse (1624312711), we get a palindrome (2796446972).

The spelling of 1172134261 in words is "one billion, one hundred seventy-two million, one hundred thirty-four thousand, two hundred sixty-one".