1085157971 has 2 divisors, whose sum is σ = 1085157972. Its totient is φ = 1085157970.

The previous prime is 1085157967. The next prime is 1085157979. The reversal of 1085157971 is 1797515801.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1085157971 - 2² = 1085157967 is a prime.

It is not a weakly prime, because it can be changed into another prime (1085157979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542578985 + 542578986.

It is an arithmetic number, because the mean of its divisors is an integer number (542578986).

Almost surely, 2^1085157971 is an apocalyptic number.

1085157971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085157971 is an equidigital number, since it uses as much as digits as its factorization.

1085157971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88200, while the sum is 44.

The square root of 1085157971 is about 32941.7360046492. The cubic root of 1085157971 is about 1027.6163091777.

The spelling of 1085157971 in words is "one billion, eighty-five million, one hundred fifty-seven thousand, nine hundred seventy-one".