1428259645 has 4 divisors (see below), whose sum is σ = 1713911580. Its totient is φ = 1142607712.

The previous prime is 1428259639. The next prime is 1428259699. The reversal of 1428259645 is 5469528241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 259918884 + 1168340761 = 16122^2 + 34181^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428259645 - 2¹⁹ = 1427735357 is a prime.

It is a super-2 number, since 2×1428259645² = 4079851227071052050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1428259595 and 1428259604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142825960 + ... + 142825969.

It is an arithmetic number, because the mean of its divisors is an integer number (428477895).

Almost surely, 2^1428259645 is an apocalyptic number.

It is an amenable number.

1428259645 is a deficient number, since it is larger than the sum of its proper divisors (285651935).

1428259645 is an equidigital number, since it uses as much as digits as its factorization.

1428259645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285651934.

The product of its digits is 691200, while the sum is 46.

The square root of 1428259645 is about 37792.3225668918. The cubic root of 1428259645 is about 1126.1659405120.

The spelling of 1428259645 in words is "one billion, four hundred twenty-eight million, two hundred fifty-nine thousand, six hundred forty-five".