1129512661 has 8 divisors (see below), whose sum is σ = 1148587448. Its totient is φ = 1110456000.

The previous prime is 1129512647. The next prime is 1129512701. The reversal of 1129512661 is 1662159211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2232036 + 1127280625 = 1494^2 + 33575^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1129512661 - 2²⁷ = 995294933 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 (1129512611) 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, 191131 + ... + 196951.

It is an arithmetic number, because the mean of its divisors is an integer number (143573431).

Almost surely, 2^1129512661 is an apocalyptic number.

It is an amenable number.

1129512661 is a deficient number, since it is larger than the sum of its proper divisors (19074787).

1129512661 is an equidigital number, since it uses as much as digits as its factorization.

1129512661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9063.

The product of its digits is 6480, while the sum is 34.

The square root of 1129512661 is about 33608.2231157793. The cubic root of 1129512661 is about 1041.4306804458.

The spelling of 1129512661 in words is "one billion, one hundred twenty-nine million, five hundred twelve thousand, six hundred sixty-one".