6981240 has 64 divisors (see below), whose sum is σ = 23938560. Its totient is φ = 1595520.

The previous prime is 6981229. The next prime is 6981251. The reversal of 6981240 is 421896.

It is an interprime number because it is at equal distance from previous prime (6981229) and next prime (6981251).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6981198 and 6981207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3316 + ... + 4995.

It is an arithmetic number, because the mean of its divisors is an integer number (374040).

Almost surely, 2^6981240 is an apocalyptic number.

6981240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6981240 is an abundant number, since it is smaller than the sum of its proper divisors (16957320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6981240 is a wasteful number, since it uses less digits than its factorization.

6981240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8332 (or 8328 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 6981240 is about 2642.2036257639. The cubic root of 6981240 is about 191.1220768701.

The spelling of 6981240 in words is "six million, nine hundred eighty-one thousand, two hundred forty".