6840251 has 6 divisors (see below), whose sum is σ = 7518756. Its totient is φ = 6218300.

The previous prime is 6840241. The next prime is 6840257. The reversal of 6840251 is 1520486.

It is not a de Polignac number, because 6840251 - 2⁶ = 6840187 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6840251.

It is not an unprimeable number, because it can be changed into a prime (6840257) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28145 + ... + 28386.

It is an arithmetic number, because the mean of its divisors is an integer number (1253126).

Almost surely, 2^6840251 is an apocalyptic number.

6840251 is a deficient number, since it is larger than the sum of its proper divisors (678505).

6840251 is a wasteful number, since it uses less digits than its factorization.

6840251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56553 (or 56542 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 6840251 is about 2615.3873518085. The cubic root of 6840251 is about 189.8267210583.

The spelling of 6840251 in words is "six million, eight hundred forty thousand, two hundred fifty-one".