6840145 has 16 divisors (see below), whose sum is σ = 9031680. Its totient is φ = 4941504.

The previous prime is 6840109. The next prime is 6840157. The reversal of 6840145 is 5410486.

It is a cyclic number.

It is not a de Polignac number, because 6840145 - 2⁷ = 6840017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1936 + ... + 4174.

It is an arithmetic number, because the mean of its divisors is an integer number (564480).

Almost surely, 2^6840145 is an apocalyptic number.

6840145 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6840145 is a deficient number, since it is larger than the sum of its proper divisors (2191535).

6840145 is a wasteful number, since it uses less digits than its factorization.

6840145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 6840145 is about 2615.3670870453. The cubic root of 6840145 is about 189.8257405029.

The spelling of 6840145 in words is "six million, eight hundred forty thousand, one hundred forty-five".