1165221404 has 12 divisors (see below), whose sum is σ = 2039727144. Its totient is φ = 582442224.

The previous prime is 1165221373. The next prime is 1165221413. The reversal of 1165221404 is 4041225611.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25862 + ... + 54765.

It is an arithmetic number, because the mean of its divisors is an integer number (169977262).

Almost surely, 2^1165221404 is an apocalyptic number.

It is an amenable number.

1165221404 is a deficient number, since it is larger than the sum of its proper divisors (874505740).

1165221404 is a wasteful number, since it uses less digits than its factorization.

1165221404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84244 (or 84242 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1165221404 is about 34135.3395178662. The cubic root of 1165221404 is about 1052.2917152814.

The spelling of 1165221404 in words is "one billion, one hundred sixty-five million, two hundred twenty-one thousand, four hundred four".