1149905851 has 4 divisors (see below), whose sum is σ = 1156259104. Its totient is φ = 1143552600.

The previous prime is 1149905849. The next prime is 1149905863. The reversal of 1149905851 is 1585099411.

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 1149905851 - 2¹ = 1149905849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1149905798 and 1149905807.

It is not an unprimeable number, because it can be changed into a prime (1149905051) 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, 3176355 + ... + 3176716.

It is an arithmetic number, because the mean of its divisors is an integer number (289064776).

Almost surely, 2^1149905851 is an apocalyptic number.

1149905851 is a deficient number, since it is larger than the sum of its proper divisors (6353253).

1149905851 is an equidigital number, since it uses as much as digits as its factorization.

1149905851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6353252.

The product of its (nonzero) digits is 64800, while the sum is 43.

The square root of 1149905851 is about 33910.2617359406. The cubic root of 1149905851 is about 1047.6609613990.

The spelling of 1149905851 in words is "one billion, one hundred forty-nine million, nine hundred five thousand, eight hundred fifty-one".