1428695087 has 4 divisors (see below), whose sum is σ = 1428928200. Its totient is φ = 1428461976.

The previous prime is 1428695077. The next prime is 1428695129. The reversal of 1428695087 is 7805968241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7805968241 = 1291 ⋅6046451.

It is a cyclic number.

It is not a de Polignac number, because 1428695087 - 2¹⁰ = 1428694063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428695077) 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 in 3 ways as a sum of consecutive naturals, for example, 107108 + ... + 119705.

It is an arithmetic number, because the mean of its divisors is an integer number (357232050).

Almost surely, 2^1428695087 is an apocalyptic number.

1428695087 is a deficient number, since it is larger than the sum of its proper divisors (233113).

1428695087 is an equidigital number, since it uses as much as digits as its factorization.

1428695087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233112.

The product of its (nonzero) digits is 967680, while the sum is 50.

The square root of 1428695087 is about 37798.0831127717. The cubic root of 1428695087 is about 1126.2803758494.

The spelling of 1428695087 in words is "one billion, four hundred twenty-eight million, six hundred ninety-five thousand, eighty-seven".