1185221949 has 8 divisors (see below), whose sum is σ = 1580665632. Its totient is φ = 789963120.

The previous prime is 1185221903. The next prime is 1185221953. The reversal of 1185221949 is 9491225811.

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

It is not a de Polignac number, because 1185221949 - 2⁸ = 1185221693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1185221949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1185221969) 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, 30487 + ... + 57444.

It is an arithmetic number, because the mean of its divisors is an integer number (197583204).

Almost surely, 2^1185221949 is an apocalyptic number.

It is an amenable number.

1185221949 is a deficient number, since it is larger than the sum of its proper divisors (395443683).

1185221949 is an equidigital number, since it uses as much as digits as its factorization.

1185221949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92427.

The product of its digits is 51840, while the sum is 42.

The square root of 1185221949 is about 34427.0525749737. The cubic root of 1185221949 is about 1058.2783101628.

The spelling of 1185221949 in words is "one billion, one hundred eighty-five million, two hundred twenty-one thousand, nine hundred forty-nine".