1021244393 has 16 divisors (see below), whose sum is σ = 1128435840. Its totient is φ = 918430464.

The previous prime is 1021244327. The next prime is 1021244401. The reversal of 1021244393 is 3934421201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021244393 is a prime.

It is a super-2 number, since 2×1021244393² = 2085880220467876898, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1021244303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80780 + ... + 92562.

It is an arithmetic number, because the mean of its divisors is an integer number (70527240).

Almost surely, 2^1021244393 is an apocalyptic number.

1021244393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1021244393 is a deficient number, since it is larger than the sum of its proper divisors (107191447).

1021244393 is a wasteful number, since it uses less digits than its factorization.

1021244393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11968.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1021244393 is about 31956.9146351772. The cubic root of 1021244393 is about 1007.0319008009.

Adding to 1021244393 its reverse (3934421201), we get a palindrome (4955665594).

The spelling of 1021244393 in words is "one billion, twenty-one million, two hundred forty-four thousand, three hundred ninety-three".