1421278 has 8 divisors (see below), whose sum is σ = 2162160. Its totient is φ = 700560.

The previous prime is 1421267. The next prime is 1421291. The reversal of 1421278 is 8721241.

It is a happy number.

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

1421278 is a modest number, since divided by 1278 gives 142 as remainder.

It is a congruent number.

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, 4863 + ... + 5146.

It is an arithmetic number, because the mean of its divisors is an integer number (270270).

2^1421278 is an apocalyptic number.

1421278 is a deficient number, since it is larger than the sum of its proper divisors (740882).

1421278 is a wasteful number, since it uses less digits than its factorization.

1421278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10082.

The product of its digits is 896, while the sum is 25.

The square root of 1421278 is about 1192.1736450702. The cubic root of 1421278 is about 112.4327960765.

It can be divided in two parts, 142 and 1278, that multiplied together give a square (181476 = 426²).

The spelling of 1421278 in words is "one million, four hundred twenty-one thousand, two hundred seventy-eight".