6985129 has 4 divisors (see below), whose sum is σ = 7155540. Its totient is φ = 6814720.

The previous prime is 6985081. The next prime is 6985133. The reversal of 6985129 is 9215896.

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 3841600 + 3143529 = 1960^2 + 1773^2 .

It is a cyclic number.

It is not a de Polignac number, because 6985129 - 2⁷ = 6985001 is a prime.

It is a Duffinian number.

6985129 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6985091 and 6985100.

It is not an unprimeable number, because it can be changed into a prime (6985159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85144 + ... + 85225.

It is an arithmetic number, because the mean of its divisors is an integer number (1788885).

Almost surely, 2^6985129 is an apocalyptic number.

It is an amenable number.

6985129 is a deficient number, since it is larger than the sum of its proper divisors (170411).

6985129 is a wasteful number, since it uses less digits than its factorization.

6985129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170410.

The product of its digits is 38880, while the sum is 40.

The square root of 6985129 is about 2642.9394620384. The cubic root of 6985129 is about 191.1575593815.

The spelling of 6985129 in words is "six million, nine hundred eighty-five thousand, one hundred twenty-nine".