1278442 has 8 divisors (see below), whose sum is σ = 2092032. Its totient is φ = 581100.

The previous prime is 1278439. The next prime is 1278463. The reversal of 1278442 is 2448721.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1278442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29034 + ... + 29077.

It is an arithmetic number, because the mean of its divisors is an integer number (261504).

2^1278442 is an apocalyptic number.

1278442 is a deficient number, since it is larger than the sum of its proper divisors (813590).

1278442 is a wasteful number, since it uses less digits than its factorization.

1278442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58124.

The product of its digits is 3584, while the sum is 28.

The square root of 1278442 is about 1130.6820950205. The cubic root of 1278442 is about 108.5326340423.

The spelling of 1278442 in words is "one million, two hundred seventy-eight thousand, four hundred forty-two".