1151665 has 12 divisors (see below), whose sum is σ = 1469916. Its totient is φ = 866048.

The previous prime is 1151659. The next prime is 1151671. The reversal of 1151665 is 5661511.

It is an interprime number because it is at equal distance from previous prime (1151659) and next prime (1151671).

It can be written as a sum of positive squares in 6 ways, for example, as 53361 + 1098304 = 231^2 + 1048^2 .

It is not a de Polignac number, because 1151665 - 2⁷ = 1151537 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1047 + ... + 1843.

It is an arithmetic number, because the mean of its divisors is an integer number (122493).

2^1151665 is an apocalyptic number.

It is an amenable number.

1151665 is a deficient number, since it is larger than the sum of its proper divisors (318251).

1151665 is an equidigital number, since it uses as much as digits as its factorization.

1151665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836 (or 819 counting only the distinct ones).

The product of its digits is 900, while the sum is 25.

The square root of 1151665 is about 1073.1565589419. The cubic root of 1151665 is about 104.8194933438.

The spelling of 1151665 in words is "one million, one hundred fifty-one thousand, six hundred sixty-five".