7681057 has 4 divisors (see below), whose sum is σ = 8015040. Its totient is φ = 7347076.

The previous prime is 7681039. The next prime is 7681109. The reversal of 7681057 is 7501867.

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.

It is a cyclic number.

It is not a de Polignac number, because 7681057 - 2⁷ = 7680929 is a prime.

7681057 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7681007) 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, 166957 + ... + 167002.

It is an arithmetic number, because the mean of its divisors is an integer number (2003760).

Almost surely, 2^7681057 is an apocalyptic number.

It is an amenable number.

7681057 is a deficient number, since it is larger than the sum of its proper divisors (333983).

7681057 is a wasteful number, since it uses less digits than its factorization.

7681057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333982.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 7681057 is about 2771.4719915597. The cubic root of 7681057 is about 197.3060168721.

It can be divided in two parts, 768105 and 7, that multiplied together give a palindrome (5376735).

The spelling of 7681057 in words is "seven million, six hundred eighty-one thousand, fifty-seven".