7641861 has 8 divisors (see below), whose sum is σ = 10203744. Its totient is φ = 5087280.

The previous prime is 7641847. The next prime is 7641863. The reversal of 7641861 is 1681467.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7641861 - 2¹⁴ = 7625477 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

7641861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7641863) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1470 + ... + 4176.

It is an arithmetic number, because the mean of its divisors is an integer number (1275468).

Almost surely, 2^7641861 is an apocalyptic number.

It is an amenable number.

7641861 is a deficient number, since it is larger than the sum of its proper divisors (2561883).

7641861 is a wasteful number, since it uses less digits than its factorization.

7641861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3651.

The product of its digits is 8064, while the sum is 33.

The square root of 7641861 is about 2764.3916148042. The cubic root of 7641861 is about 196.9698305556.

The spelling of 7641861 in words is "seven million, six hundred forty-one thousand, eight hundred sixty-one".