1142705 has 8 divisors (see below), whose sum is σ = 1377000. Its totient is φ = 910336.

The previous prime is 1142693. The next prime is 1142707. The reversal of 1142705 is 5072411.

It can be written as a sum of positive squares in 4 ways, for example, as 309136 + 833569 = 556^2 + 913^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142705 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1142707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1991 + ... + 2499.

It is an arithmetic number, because the mean of its divisors is an integer number (172125).

2^1142705 is an apocalyptic number.

It is an amenable number.

1142705 is a deficient number, since it is larger than the sum of its proper divisors (234295).

1142705 is an equidigital number, since it uses as much as digits as its factorization.

1142705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1142705 is about 1068.9738069756. The cubic root of 1142705 is about 104.5469520322.

The spelling of 1142705 in words is "one million, one hundred forty-two thousand, seven hundred five".