7938561 has 8 divisors (see below), whose sum is σ = 11141920. Its totient is φ = 5013792.

The previous prime is 7938551. The next prime is 7938563. The reversal of 7938561 is 1658397.

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

It is not a de Polignac number, because 7938561 - 2⁵ = 7938529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7938563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69580 + ... + 69693.

It is an arithmetic number, because the mean of its divisors is an integer number (1392740).

Almost surely, 2^7938561 is an apocalyptic number.

It is an amenable number.

7938561 is a deficient number, since it is larger than the sum of its proper divisors (3203359).

7938561 is a wasteful number, since it uses less digits than its factorization.

7938561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139295.

The product of its digits is 45360, while the sum is 39.

The square root of 7938561 is about 2817.5452081555. The cubic root of 7938561 is about 199.4866920351.

The spelling of 7938561 in words is "seven million, nine hundred thirty-eight thousand, five hundred sixty-one".