1421878 has 8 divisors (see below), whose sum is σ = 2154240. Its totient is φ = 703800.

The previous prime is 1421867. The next prime is 1421909. The reversal of 1421878 is 8781241.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3318 + ... + 3721.

It is an arithmetic number, because the mean of its divisors is an integer number (269280).

2^1421878 is an apocalyptic number.

1421878 is a deficient number, since it is larger than the sum of its proper divisors (732362).

1421878 is a wasteful number, since it uses less digits than its factorization.

1421878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7142.

The product of its digits is 3584, while the sum is 31.

The square root of 1421878 is about 1192.4252597123. The cubic root of 1421878 is about 112.4486152165.

The spelling of 1421878 in words is "one million, four hundred twenty-one thousand, eight hundred seventy-eight".