1142609 has 6 divisors (see below), whose sum is σ = 1237446. Its totient is φ = 1054560.

The previous prime is 1142599. The next prime is 1142633. The reversal of 1142609 is 9062411.

1142609 = 197² + 198² + ... + 222².

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 29584 + 1113025 = 172^2 + 1055^2 .

It is not a de Polignac number, because 1142609 - 2⁴ = 1142593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1142509) 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 5 ways as a sum of consecutive naturals, for example, 3212 + ... + 3549.

It is an arithmetic number, because the mean of its divisors is an integer number (206241).

2^1142609 is an apocalyptic number.

It is an amenable number.

1142609 is a deficient number, since it is larger than the sum of its proper divisors (94837).

1142609 is an equidigital number, since it uses as much as digits as its factorization.

1142609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6787 (or 6774 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1142609 is about 1068.9289031549. The cubic root of 1142609 is about 104.5440242458.

The spelling of 1142609 in words is "one million, one hundred forty-two thousand, six hundred nine".