7142207857 has 2 divisors, whose sum is σ = 7142207858. Its totient is φ = 7142207856.

The previous prime is 7142207837. The next prime is 7142207881. The reversal of 7142207857 is 7587022417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6825403456 + 316804401 = 82616^2 + 17799^2 .

It is a cyclic number.

It is not a de Polignac number, because 7142207857 - 2⁷ = 7142207729 is a prime.

It is a super-2 number, since 2×7142207857² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7142207837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3571103928 + 3571103929.

It is an arithmetic number, because the mean of its divisors is an integer number (3571103929).

Almost surely, 2^7142207857 is an apocalyptic number.

It is an amenable number.

7142207857 is a deficient number, since it is larger than the sum of its proper divisors (1).

7142207857 is an equidigital number, since it uses as much as digits as its factorization.

7142207857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 219520, while the sum is 43.

The square root of 7142207857 is about 84511.5841586229. The cubic root of 7142207857 is about 1925.7984303125.

The spelling of 7142207857 in words is "seven billion, one hundred forty-two million, two hundred seven thousand, eight hundred fifty-seven".