1157985 has 12 divisors (see below), whose sum is σ = 2007252. Its totient is φ = 617568.

The previous prime is 1157977. The next prime is 1157987. The reversal of 1157985 is 5897511.

1157985 is a `hidden beast` number, since 1 + 1 + 579 + 85 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 219024 + 938961 = 468^2 + 969^2 .

It is not a de Polignac number, because 1157985 - 2³ = 1157977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1157987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12822 + ... + 12911.

It is an arithmetic number, because the mean of its divisors is an integer number (167271).

2^1157985 is an apocalyptic number.

1157985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1157985 is a deficient number, since it is larger than the sum of its proper divisors (849267).

1157985 is a wasteful number, since it uses less digits than its factorization.

1157985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25744 (or 25741 counting only the distinct ones).

The product of its digits is 12600, while the sum is 36.

The square root of 1157985 is about 1076.0971145766. The cubic root of 1157985 is about 105.0108832257.

It can be divided in two parts, 11579 and 85, that added together give a square (11664 = 108²).

The spelling of 1157985 in words is "one million, one hundred fifty-seven thousand, nine hundred eighty-five".