6987825 has 36 divisors (see below), whose sum is σ = 13484380. Its totient is φ = 3438720.

The previous prime is 6987823. The next prime is 6987847. The reversal of 6987825 is 5287896.

It can be written as a sum of positive squares in 6 ways, for example, as 1498176 + 5489649 = 1224^2 + 2343^2 .

It is not a de Polignac number, because 6987825 - 2¹ = 6987823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (6987821) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1731 + ... + 4119.

Almost surely, 2^6987825 is an apocalyptic number.

6987825 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6987825 is a deficient number, since it is larger than the sum of its proper divisors (6496555).

6987825 is a wasteful number, since it uses less digits than its factorization.

6987825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418 (or 2410 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 6987825 is about 2643.4494510015. The cubic root of 6987825 is about 191.1821494542.

The spelling of 6987825 in words is "six million, nine hundred eighty-seven thousand, eight hundred twenty-five".