1200142 has 4 divisors (see below), whose sum is σ = 1800216. Its totient is φ = 600070.

The previous prime is 1200139. The next prime is 1200161. The reversal of 1200142 is 2410021.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300034 + ... + 300037.

It is an arithmetic number, because the mean of its divisors is an integer number (450054).

2^1200142 is an apocalyptic number.

1200142 is a deficient number, since it is larger than the sum of its proper divisors (600074).

1200142 is an equidigital number, since it uses as much as digits as its factorization.

1200142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600073.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1200142 is about 1095.5099269290. The cubic root of 1200142 is about 106.2700483506.

Adding to 1200142 its reverse (2410021), we get a palindrome (3610163).

The spelling of 1200142 in words is "one million, two hundred thousand, one hundred forty-two".