1142009 has 16 divisors (see below), whose sum is σ = 1368576. Its totient is φ = 940800.

The previous prime is 1142003. The next prime is 1142017. The reversal of 1142009 is 9002411.

1142009 = T₂₄₂ + T₂₄₃ + ... + T₂₇₅.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1142009 - 2¹⁶ = 1076473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1142003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5699 + ... + 5895.

It is an arithmetic number, because the mean of its divisors is an integer number (85536).

2^1142009 is an apocalyptic number.

It is an amenable number.

1142009 is a deficient number, since it is larger than the sum of its proper divisors (226567).

1142009 is a wasteful number, since it uses less digits than its factorization.

1142009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1142009 is about 1068.6482115271. The cubic root of 1142009 is about 104.5257218643.

The spelling of 1142009 in words is "one million, one hundred forty-two thousand, nine".