1145021204 has 24 divisors (see below), whose sum is σ = 2018260608. Its totient is φ = 568386720.

The previous prime is 1145021173. The next prime is 1145021209. The reversal of 1145021204 is 4021205411.

It is a happy number.

It is a super-2 number, since 2×1145021204² = 2622147115219219232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145021209) 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, 641297 + ... + 643079.

It is an arithmetic number, because the mean of its divisors is an integer number (84094192).

Almost surely, 2^1145021204 is an apocalyptic number.

It is an amenable number.

1145021204 is a deficient number, since it is larger than the sum of its proper divisors (873239404).

1145021204 is a wasteful number, since it uses less digits than its factorization.

1145021204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855 (or 2853 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1145021204 is about 33838.1619477181. The cubic root of 1145021204 is about 1046.1754145013.

Adding to 1145021204 its reverse (4021205411), we get a palindrome (5166226615).

The spelling of 1145021204 in words is "one billion, one hundred forty-five million, twenty-one thousand, two hundred four".