7126981 has 2 divisors, whose sum is σ = 7126982. Its totient is φ = 7126980.

The previous prime is 7126979. The next prime is 7126997. The reversal of 7126981 is 1896217.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6974881 + 152100 = 2641^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 7126981 - 2¹ = 7126979 is a prime.

It is a super-2 number, since 2×7126981² = 101587716348722, which contains 22 as substring.

Together with 7126979, it forms a pair of twin primes.

7126981 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7126901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3563490 + 3563491.

It is an arithmetic number, because the mean of its divisors is an integer number (3563491).

Almost surely, 2^7126981 is an apocalyptic number.

It is an amenable number.

7126981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7126981 is an equidigital number, since it uses as much as digits as its factorization.

7126981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 34.

The square root of 7126981 is about 2669.6406125170. The cubic root of 7126981 is about 192.4428885505.

The spelling of 7126981 in words is "seven million, one hundred twenty-six thousand, nine hundred eighty-one".