1145004021 has 36 divisors (see below), whose sum is σ = 1937863200. Its totient is φ = 649546128.

The previous prime is 1145004017. The next prime is 1145004041. The reversal of 1145004021 is 1204005411.

It is not a de Polignac number, because 1145004021 - 2² = 1145004017 is a prime.

It is a super-2 number, since 2×1145004021² = 2622068416212336882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1145003985 and 1145004003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145004001) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51960 + ... + 70638.

Almost surely, 2^1145004021 is an apocalyptic number.

It is an amenable number.

1145004021 is a deficient number, since it is larger than the sum of its proper divisors (792859179).

1145004021 is a wasteful number, since it uses less digits than its factorization.

1145004021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18838 (or 18828 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1145004021 is about 33837.9080470410. The cubic root of 1145004021 is about 1046.1701812585.

Adding to 1145004021 its reverse (1204005411), we get a palindrome (2349009432).

The spelling of 1145004021 in words is "one billion, one hundred forty-five million, four thousand, twenty-one".