1131185429 has 8 divisors (see below), whose sum is σ = 1234281888. Its totient is φ = 1028132560.

The previous prime is 1131185371. The next prime is 1131185441. The reversal of 1131185429 is 9245811311.

It is a happy number.

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 1131185429 - 2¹² = 1131181333 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 (1131185459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68654 + ... + 83520.

It is an arithmetic number, because the mean of its divisors is an integer number (154285236).

Almost surely, 2^1131185429 is an apocalyptic number.

It is an amenable number.

1131185429 is a deficient number, since it is larger than the sum of its proper divisors (103096459).

1131185429 is a wasteful number, since it uses less digits than its factorization.

1131185429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21795.

The product of its digits is 8640, while the sum is 35.

The square root of 1131185429 is about 33633.1001990599. The cubic root of 1131185429 is about 1041.9445341048.

The spelling of 1131185429 in words is "one billion, one hundred thirty-one million, one hundred eighty-five thousand, four hundred twenty-nine".