1163021445 has 24 divisors (see below), whose sum is σ = 2122005600. Its totient is φ = 587631456.

The previous prime is 1163021429. The next prime is 1163021449. The reversal of 1163021445 is 5441203611.

It is a happy number.

1163021445 is a `hidden beast` number, since 1 + 1 + 630 + 21 + 4 + 4 + 5 = 666.

It is not a de Polignac number, because 1163021445 - 2⁴ = 1163021429 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163021449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 679275 + ... + 680984.

It is an arithmetic number, because the mean of its divisors is an integer number (88416900).

Almost surely, 2^1163021445 is an apocalyptic number.

1163021445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1163021445 is a deficient number, since it is larger than the sum of its proper divisors (958984155).

1163021445 is a wasteful number, since it uses less digits than its factorization.

1163021445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360289 (or 1360286 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1163021445 is about 34103.1002256393. The cubic root of 1163021445 is about 1051.6290494935.

The spelling of 1163021445 in words is "one billion, one hundred sixty-three million, twenty-one thousand, four hundred forty-five".