1985387025 has 24 divisors (see below), whose sum is σ = 3425227200. Its totient is φ = 1012834240.

The previous prime is 1985387017. The next prime is 1985387029. The reversal of 1985387025 is 5207835891.

It is not a de Polignac number, because 1985387025 - 2³ = 1985387017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1985387029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 573750 + ... + 577199.

It is an arithmetic number, because the mean of its divisors is an integer number (142717800).

Almost surely, 2^1985387025 is an apocalyptic number.

1985387025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1985387025 is a deficient number, since it is larger than the sum of its proper divisors (1439840175).

1985387025 is a wasteful number, since it uses less digits than its factorization.

1985387025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150985 (or 1150980 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

The square root of 1985387025 is about 44557.6819976084. The cubic root of 1985387025 is about 1256.8450135452.

The spelling of 1985387025 in words is "one billion, nine hundred eighty-five million, three hundred eighty-seven thousand, twenty-five".