7981001 has 4 divisors (see below), whose sum is σ = 9121152. Its totient is φ = 6840852.

The previous prime is 7980997. The next prime is 7981013. The reversal of 7981001 is 1001897.

7981001 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1001897 = 13 ⋅77069.

It is a cyclic number.

It is not a de Polignac number, because 7981001 - 2² = 7980997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7981021) 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, 570065 + ... + 570078.

It is an arithmetic number, because the mean of its divisors is an integer number (2280288).

Almost surely, 2^7981001 is an apocalyptic number.

It is an amenable number.

7981001 is a deficient number, since it is larger than the sum of its proper divisors (1140151).

7981001 is a wasteful number, since it uses less digits than its factorization.

7981001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140150.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 7981001 is about 2825.0665478887. The cubic root of 7981001 is about 199.8415495003.

Adding to 7981001 its reverse (1001897), we get a palindrome (8982898).

The spelling of 7981001 in words is "seven million, nine hundred eighty-one thousand, one".