1157965 has 8 divisors (see below), whose sum is σ = 1403928. Its totient is φ = 916800.

The previous prime is 1157953. The next prime is 1157969. The reversal of 1157965 is 5697511.

It can be written as a sum of positive squares in 4 ways, for example, as 272484 + 885481 = 522^2 + 941^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1157965 - 2⁷ = 1157837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1157965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157969) 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 7 ways as a sum of consecutive naturals, for example, 642 + ... + 1651.

It is an arithmetic number, because the mean of its divisors is an integer number (175491).

2^1157965 is an apocalyptic number.

It is an amenable number.

1157965 is a deficient number, since it is larger than the sum of its proper divisors (245963).

1157965 is a wasteful number, since it uses less digits than its factorization.

1157965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2399.

The product of its digits is 9450, while the sum is 34.

The square root of 1157965 is about 1076.0878216949. The cubic root of 1157965 is about 105.0102786612.

The spelling of 1157965 in words is "one million, one hundred fifty-seven thousand, nine hundred sixty-five".