1142147 has 8 divisors (see below), whose sum is σ = 1228800. Its totient is φ = 1058184.

The previous prime is 1142131. The next prime is 1142159. The reversal of 1142147 is 7412411.

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 1142147 - 2⁴ = 1142131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144147) 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, 254 + ... + 1532.

It is an arithmetic number, because the mean of its divisors is an integer number (153600).

2^1142147 is an apocalyptic number.

1142147 is a deficient number, since it is larger than the sum of its proper divisors (86653).

1142147 is a wasteful number, since it uses less digits than its factorization.

1142147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345.

The product of its digits is 224, while the sum is 20.

The square root of 1142147 is about 1068.7127771296. The cubic root of 1142147 is about 104.5299319796.

Adding to 1142147 its reverse (7412411), we get a palindrome (8554558).

The spelling of 1142147 in words is "one million, one hundred forty-two thousand, one hundred forty-seven".