7157057 has 4 divisors (see below), whose sum is σ = 7174020. Its totient is φ = 7140096.

The previous prime is 7157047. The next prime is 7157089. The reversal of 7157057 is 7507517.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3682561 + 3474496 = 1919^2 + 1864^2 .

It is a cyclic number.

It is not a de Polignac number, because 7157057 - 2⁴ = 7157041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7157027) 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 3 ways as a sum of consecutive naturals, for example, 7832 + ... + 8697.

It is an arithmetic number, because the mean of its divisors is an integer number (1793505).

Almost surely, 2^7157057 is an apocalyptic number.

It is an amenable number.

7157057 is a deficient number, since it is larger than the sum of its proper divisors (16963).

7157057 is a wasteful number, since it uses less digits than its factorization.

7157057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16962.

The product of its (nonzero) digits is 8575, while the sum is 32.

The square root of 7157057 is about 2675.2676501614. The cubic root of 7157057 is about 192.7132129066.

The spelling of 7157057 in words is "seven million, one hundred fifty-seven thousand, fifty-seven".