8042657 has 8 divisors (see below), whose sum is σ = 9508800. Its totient is φ = 6655824.

The previous prime is 8042647. The next prime is 8042659. The reversal of 8042657 is 7562408.

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

It is not a de Polignac number, because 8042657 - 2⁴ = 8042641 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8042659) 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, 19607 + ... + 20012.

It is an arithmetic number, because the mean of its divisors is an integer number (1188600).

Almost surely, 2^8042657 is an apocalyptic number.

It is an amenable number.

8042657 is a deficient number, since it is larger than the sum of its proper divisors (1466143).

8042657 is a wasteful number, since it uses less digits than its factorization.

8042657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39655.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 8042657 is about 2835.9578628746. The cubic root of 8042657 is about 200.3548450526.

Subtracting from 8042657 its reverse (7562408), we obtain a square (480249 = 693²).

The spelling of 8042657 in words is "eight million, forty-two thousand, six hundred fifty-seven".