7198641 has 12 divisors (see below), whose sum is σ = 10756980. Its totient is φ = 4633440.

The previous prime is 7198621. The next prime is 7198643. The reversal of 7198641 is 1468917.

7198641 is a `hidden beast` number, since 7 + 1 + 9 + 8 + 641 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6051600 + 1147041 = 2460^2 + 1071^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7198641 is a prime.

7198641 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7198596 and 7198605.

It is not an unprimeable number, because it can be changed into a prime (7198643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13530 + ... + 14051.

It is an arithmetic number, because the mean of its divisors is an integer number (896415).

Almost surely, 2^7198641 is an apocalyptic number.

It is an amenable number.

7198641 is a deficient number, since it is larger than the sum of its proper divisors (3558339).

7198641 is a wasteful number, since it uses less digits than its factorization.

7198641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27616 (or 27613 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 7198641 is about 2683.0283263507. The cubic root of 7198641 is about 193.0857270819.

It can be divided in two parts, 71986 and 41, that added together give a palindrome (72027).

The spelling of 7198641 in words is "seven million, one hundred ninety-eight thousand, six hundred forty-one".