1145761 has 4 divisors (see below), whose sum is σ = 1185300. Its totient is φ = 1106224.

The previous prime is 1145747. The next prime is 1145773. The reversal of 1145761 is 1675411.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 414736 + 731025 = 644^2 + 855^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145761 - 2¹³ = 1137569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145741) 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 3 ways as a sum of consecutive naturals, for example, 19726 + ... + 19783.

It is an arithmetic number, because the mean of its divisors is an integer number (296325).

2^1145761 is an apocalyptic number.

It is an amenable number.

1145761 is a deficient number, since it is larger than the sum of its proper divisors (39539).

1145761 is an equidigital number, since it uses as much as digits as its factorization.

1145761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39538.

The product of its digits is 840, while the sum is 25.

The square root of 1145761 is about 1070.4022608347. The cubic root of 1145761 is about 104.6400676636.

The spelling of 1145761 in words is "one million, one hundred forty-five thousand, seven hundred sixty-one".