1285714321 has 2 divisors, whose sum is σ = 1285714322. Its totient is φ = 1285714320.

The previous prime is 1285714273. The next prime is 1285714327. The reversal of 1285714321 is 1234175821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1162059921 + 123654400 = 34089^2 + 11120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1285714321 is a prime.

It is a super-2 number, since 2×1285714321² = 3306122630448982082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1285714327) 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 as a sum of consecutive naturals, namely, 642857160 + 642857161.

It is an arithmetic number, because the mean of its divisors is an integer number (642857161).

Almost surely, 2^1285714321 is an apocalyptic number.

It is an amenable number.

1285714321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285714321 is an equidigital number, since it uses as much as digits as its factorization.

1285714321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 34.

The square root of 1285714321 is about 35856.8587720676. The cubic root of 1285714321 is about 1087.3803829504.

The spelling of 1285714321 in words is "one billion, two hundred eighty-five million, seven hundred fourteen thousand, three hundred twenty-one".