1428252769 has 2 divisors, whose sum is σ = 1428252770. Its totient is φ = 1428252768.

The previous prime is 1428252751. The next prime is 1428252803. The reversal of 1428252769 is 9672528241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1082739025 + 345513744 = 32905^2 + 18588^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428252769 - 2⁷ = 1428252641 is a prime.

It is a super-2 number, since 2×1428252769² = 4079811944312334722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1428352769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714126384 + 714126385.

It is an arithmetic number, because the mean of its divisors is an integer number (714126385).

Almost surely, 2^1428252769 is an apocalyptic number.

It is an amenable number.

1428252769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428252769 is an equidigital number, since it uses as much as digits as its factorization.

1428252769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The square root of 1428252769 is about 37792.2315959246. The cubic root of 1428252769 is about 1126.1641332941.

The spelling of 1428252769 in words is "one billion, four hundred twenty-eight million, two hundred fifty-two thousand, seven hundred sixty-nine".