1072388321 has 2 divisors, whose sum is σ = 1072388322. Its totient is φ = 1072388320.

The previous prime is 1072388243. The next prime is 1072388351. The reversal of 1072388321 is 1238832701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 591024721 + 481363600 = 24311^2 + 21940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1072388321 is a prime.

It is a super-2 number, since 2×1072388321² = 2300033422034398082, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1072388351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536194160 + 536194161.

It is an arithmetic number, because the mean of its divisors is an integer number (536194161).

Almost surely, 2^1072388321 is an apocalyptic number.

It is an amenable number.

1072388321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1072388321 is an equidigital number, since it uses as much as digits as its factorization.

1072388321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 1072388321 is about 32747.3406706560. The cubic root of 1072388321 is about 1023.5695520665.

The spelling of 1072388321 in words is "one billion, seventy-two million, three hundred eighty-eight thousand, three hundred twenty-one".