1280142 has 12 divisors (see below), whose sum is σ = 2773680. Its totient is φ = 426708.

The previous prime is 1280141. The next prime is 1280159. The reversal of 1280142 is 2410821.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 71119 = 1280142 / (1 + 2 + 8 + 0 + 1 + 4 + 2).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35542 + ... + 35577.

It is an arithmetic number, because the mean of its divisors is an integer number (231140).

2^1280142 is an apocalyptic number.

1280142 is an abundant number, since it is smaller than the sum of its proper divisors (1493538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1280142 is a wasteful number, since it uses less digits than its factorization.

1280142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71127 (or 71124 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1280142 is about 1131.4336038849. The cubic root of 1280142 is about 108.5807195914.

Adding to 1280142 its reverse (2410821), we get a palindrome (3690963).

The spelling of 1280142 in words is "one million, two hundred eighty thousand, one hundred forty-two".