1200340142 has 4 divisors (see below), whose sum is σ = 1800510216. Its totient is φ = 600170070.

The previous prime is 1200340117. The next prime is 1200340157. The reversal of 1200340142 is 2410430021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2410430021 = 1321 ⋅1824701.

It is a self number, because there is not a number n which added to its sum of digits gives 1200340142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300085034 + ... + 300085037.

It is an arithmetic number, because the mean of its divisors is an integer number (450127554).

Almost surely, 2^1200340142 is an apocalyptic number.

1200340142 is a deficient number, since it is larger than the sum of its proper divisors (600170074).

1200340142 is an equidigital number, since it uses as much as digits as its factorization.

1200340142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600170073.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1200340142 is about 34645.9253304050. The cubic root of 1200340142 is about 1062.7589638117.

Adding to 1200340142 its reverse (2410430021), we get a palindrome (3610770163).

The spelling of 1200340142 in words is "one billion, two hundred million, three hundred forty thousand, one hundred forty-two".