1025287787 has 4 divisors (see below), whose sum is σ = 1031214480. Its totient is φ = 1019361096.

The previous prime is 1025287777. The next prime is 1025287793. The reversal of 1025287787 is 7877825201.

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

It is a cyclic number.

It is not a de Polignac number, because 1025287787 - 2⁴ = 1025287771 is a prime.

It is a super-3 number, since 3×1025287787³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025287717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2963087 + ... + 2963432.

It is an arithmetic number, because the mean of its divisors is an integer number (257803620).

Almost surely, 2^1025287787 is an apocalyptic number.

1025287787 is a deficient number, since it is larger than the sum of its proper divisors (5926693).

1025287787 is an equidigital number, since it uses as much as digits as its factorization.

1025287787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5926692.

The product of its (nonzero) digits is 439040, while the sum is 47.

The square root of 1025287787 is about 32020.1153495736. The cubic root of 1025287787 is about 1008.3591915475.

The spelling of 1025287787 in words is "one billion, twenty-five million, two hundred eighty-seven thousand, seven hundred eighty-seven".