6861247 has 4 divisors (see below), whose sum is σ = 6922080. Its totient is φ = 6800416.

The previous prime is 6861241. The next prime is 6861263. The reversal of 6861247 is 7421686.

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 6861247 - 2⁷ = 6861119 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6861241) 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, 30247 + ... + 30472.

It is an arithmetic number, because the mean of its divisors is an integer number (1730520).

Almost surely, 2^6861247 is an apocalyptic number.

6861247 is a deficient number, since it is larger than the sum of its proper divisors (60833).

6861247 is a wasteful number, since it uses less digits than its factorization.

6861247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60832.

The product of its digits is 16128, while the sum is 34.

The square root of 6861247 is about 2619.3982133307. The cubic root of 6861247 is about 190.0207456572.

The spelling of 6861247 in words is "six million, eight hundred sixty-one thousand, two hundred forty-seven".