1173261213 has 8 divisors (see below), whose sum is σ = 1738164800. Its totient is φ = 782174124.

The previous prime is 1173261169. The next prime is 1173261217. The reversal of 1173261213 is 3121623711.

1173261213 is a `hidden beast` number, since 1 + 1 + 7 + 32 + 612 + 13 = 666.

It is not a de Polignac number, because 1173261213 - 2¹⁰ = 1173260189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 43454119 = 1173261213 / (1 + 1 + 7 + 3 + 2 + 6 + 1 + 2 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1173261217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21727033 + ... + 21727086.

It is an arithmetic number, because the mean of its divisors is an integer number (217270600).

Almost surely, 2^1173261213 is an apocalyptic number.

It is an amenable number.

1173261213 is a deficient number, since it is larger than the sum of its proper divisors (564903587).

1173261213 is an equidigital number, since it uses as much as digits as its factorization.

1173261213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43454128 (or 43454122 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 1173261213 is about 34252.9007968668. The cubic root of 1173261213 is about 1054.7063753145.

Adding to 1173261213 its reverse (3121623711), we get a palindrome (4294884924).

The spelling of 1173261213 in words is "one billion, one hundred seventy-three million, two hundred sixty-one thousand, two hundred thirteen".