6247981 has 4 divisors (see below), whose sum is σ = 6263964. Its totient is φ = 6232000.

The previous prime is 6247937. The next prime is 6247987. The reversal of 6247981 is 1897426.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1897426 = 2 ⋅948713.

It can be written as a sum of positive squares in 2 ways, for example, as 4583881 + 1664100 = 2141^2 + 1290^2 .

It is a cyclic number.

It is not a de Polignac number, because 6247981 - 2⁷ = 6247853 is a prime.

It is a super-2 number, since 2×6247981² = 78074533152722, which contains 22 as substring.

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 6247981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6247987) 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, 7390 + ... + 8191.

It is an arithmetic number, because the mean of its divisors is an integer number (1565991).

Almost surely, 2^6247981 is an apocalyptic number.

It is an amenable number.

6247981 is a deficient number, since it is larger than the sum of its proper divisors (15983).

6247981 is a wasteful number, since it uses less digits than its factorization.

6247981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15982.

The product of its digits is 24192, while the sum is 37.

The square root of 6247981 is about 2499.5961673838. The cubic root of 6247981 is about 184.1817379702.

The spelling of 6247981 in words is "six million, two hundred forty-seven thousand, nine hundred eighty-one".