1021143345 has 32 divisors (see below), whose sum is σ = 1668374400. Its totient is φ = 533205504.

The previous prime is 1021143341. The next prime is 1021143359. The reversal of 1021143345 is 5433411201.

It is a happy number.

It is not a de Polignac number, because 1021143345 - 2² = 1021143341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021143341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148851 + ... + 155559.

It is an arithmetic number, because the mean of its divisors is an integer number (52136700).

Almost surely, 2^1021143345 is an apocalyptic number.

1021143345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021143345 is a deficient number, since it is larger than the sum of its proper divisors (647231055).

1021143345 is a wasteful number, since it uses less digits than its factorization.

1021143345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6929.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1021143345 is about 31955.3335923755. Note that the first 3 decimals coincide. The cubic root of 1021143345 is about 1006.9986857949.

Adding to 1021143345 its reverse (5433411201), we get a palindrome (6454554546).

The spelling of 1021143345 in words is "one billion, twenty-one million, one hundred forty-three thousand, three hundred forty-five".