1142855 has 8 divisors (see below), whose sum is σ = 1567392. Its totient is φ = 783648.

The previous prime is 1142851. The next prime is 1142863. The reversal of 1142855 is 5582411.

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

It is a cyclic number.

It is not a de Polignac number, because 1142855 - 2² = 1142851 is a prime.

It is a super-2 number, since 2×1142855² = 2612235102050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142851) 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, 16292 + ... + 16361.

It is an arithmetic number, because the mean of its divisors is an integer number (195924).

2^1142855 is an apocalyptic number.

1142855 is a deficient number, since it is larger than the sum of its proper divisors (424537).

1142855 is an equidigital number, since it uses as much as digits as its factorization.

1142855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32665.

The product of its digits is 1600, while the sum is 26.

The square root of 1142855 is about 1069.0439654196. The cubic root of 1142855 is about 104.5515263702.

The spelling of 1142855 in words is "one million, one hundred forty-two thousand, eight hundred fifty-five".