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1142761 = 10692

1142761 has 3 divisors (see below), whose sum is σ = 1143831. Its totient is φ = 1141692.

The previous prime is 1142759. The next prime is 1142773. The reversal of 1142761 is 1672411.

The square root of 1142761 is 1069.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 534361 + 608400 = 731^2 + 780^2 .

It is not a de Polignac number, because 1142761 - 21 = 1142759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142161) 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 in 2 ways as a sum of consecutive naturals, for example, 535 + ... + 1603.

It is an arithmetic number, because the mean of its divisors is an integer number (381277).

21142761 is an apocalyptic number.

1142761 is the 1069-th square number.

1142761 is the 535-th centered octagonal number.

It is an amenable number.

1142761 is a deficient number, since it is larger than the sum of its proper divisors (1070).

1142761 is an frugal number, since it uses more digits than its factorization.

1142761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138 (or 1069 counting only the distinct ones).

The product of its digits is 336, while the sum is 22.

The cubic root of 1142761 is about 104.5486598318.

The spelling of 1142761 in words is "one million, one hundred forty-two thousand, seven hundred sixty-one".

Divisors: 1 1069 1142761