1165221046 has 12 divisors (see below), whose sum is σ = 1921170636. Its totient is φ = 529645820.

The previous prime is 1165221017. The next prime is 1165221047. The reversal of 1165221046 is 6401225611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165221047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2407240 + ... + 2407723.

It is an arithmetic number, because the mean of its divisors is an integer number (160097553).

Almost surely, 2^1165221046 is an apocalyptic number.

1165221046 is a deficient number, since it is larger than the sum of its proper divisors (755949590).

1165221046 is a wasteful number, since it uses less digits than its factorization.

1165221046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4814987 (or 4814976 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1165221046 is about 34135.3342740334. The cubic root of 1165221046 is about 1052.2916075135.

Adding to 1165221046 its reverse (6401225611), we get a palindrome (7566446657).

The spelling of 1165221046 in words is "one billion, one hundred sixty-five million, two hundred twenty-one thousand, forty-six".