1145236021 has 8 divisors (see below), whose sum is σ = 1166112864. Its totient is φ = 1124427120.

The previous prime is 1145236009. The next prime is 1145236063. The reversal of 1145236021 is 1206325411.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1145236021 - 2¹³ = 1145227829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145236121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17670 + ... + 51016.

It is an arithmetic number, because the mean of its divisors is an integer number (145764108).

Almost surely, 2^1145236021 is an apocalyptic number.

It is an amenable number.

1145236021 is a deficient number, since it is larger than the sum of its proper divisors (20876843).

1145236021 is an equidigital number, since it uses as much as digits as its factorization.

1145236021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33971.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1145236021 is about 33841.3359813114. The cubic root of 1145236021 is about 1046.2408346031.

The spelling of 1145236021 in words is "one billion, one hundred forty-five million, two hundred thirty-six thousand, twenty-one".