1145030021 has 4 divisors (see below), whose sum is σ = 1147503552. Its totient is φ = 1142556492.

The previous prime is 1145029979. The next prime is 1145030023. The reversal of 1145030021 is 1200305411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1145030021 - 2⁶ = 1145029957 is a prime.

It is a super-2 number, since 2×1145030021² = 2622187497982520882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145030023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1236071 + ... + 1236996.

It is an arithmetic number, because the mean of its divisors is an integer number (286875888).

Almost surely, 2^1145030021 is an apocalyptic number.

It is an amenable number.

1145030021 is a deficient number, since it is larger than the sum of its proper divisors (2473531).

1145030021 is an equidigital number, since it uses as much as digits as its factorization.

1145030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473530.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1145030021 is about 33838.2922293664. The cubic root of 1145030021 is about 1046.1780997805.

Adding to 1145030021 its reverse (1200305411), we get a palindrome (2345335432).

The spelling of 1145030021 in words is "one billion, one hundred forty-five million, thirty thousand, twenty-one".