6891485 has 8 divisors (see below), whose sum is σ = 8471736. Its totient is φ = 5378560.

The previous prime is 6891461. The next prime is 6891487. The reversal of 6891485 is 5841986.

It can be written as a sum of positive squares in 4 ways, for example, as 198916 + 6692569 = 446^2 + 2587^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6891485 - 2¹² = 6887389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6891487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16604 + ... + 17013.

It is an arithmetic number, because the mean of its divisors is an integer number (1058967).

Almost surely, 2^6891485 is an apocalyptic number.

It is an amenable number.

6891485 is a deficient number, since it is larger than the sum of its proper divisors (1580251).

6891485 is a wasteful number, since it uses less digits than its factorization.

6891485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33663.

The product of its digits is 69120, while the sum is 41.

The square root of 6891485 is about 2625.1638044130. The cubic root of 6891485 is about 190.2994815356.

It can be divided in two parts, 689 and 1485, that multiplied together give a triangular number (1023165 = T₁₄₃₀).

The spelling of 6891485 in words is "six million, eight hundred ninety-one thousand, four hundred eighty-five".