857250049 has 2 divisors, whose sum is σ = 857250050. Its totient is φ = 857250048.

The previous prime is 857250001. The next prime is 857250067. The reversal of 857250049 is 940052758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 839145024 + 18105025 = 28968^2 + 4255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-857250049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 857249993 and 857250020.

It is not a weakly prime, because it can be changed into another prime (857250649) 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 as a sum of consecutive naturals, namely, 428625024 + 428625025.

It is an arithmetic number, because the mean of its divisors is an integer number (428625025).

Almost surely, 2^857250049 is an apocalyptic number.

It is an amenable number.

857250049 is a deficient number, since it is larger than the sum of its proper divisors (1).

857250049 is an equidigital number, since it uses as much as digits as its factorization.

857250049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 857250049 is about 29278.8327806967. The cubic root of 857250049 is about 949.9538478041.

The spelling of 857250049 in words is "eight hundred fifty-seven million, two hundred fifty thousand, forty-nine".