1421478 has 24 divisors (see below), whose sum is σ = 3105648. Its totient is φ = 469872.

The previous prime is 1421473. The next prime is 1421479. The reversal of 1421478 is 8741241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2575 + ... + 3077.

It is an arithmetic number, because the mean of its divisors is an integer number (129402).

2^1421478 is an apocalyptic number.

1421478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1421478 is an abundant number, since it is smaller than the sum of its proper divisors (1684170).

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

1421478 is a wasteful number, since it uses less digits than its factorization.

1421478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 665 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 1421478 is about 1192.2575225177. The cubic root of 1421478 is about 112.4380696178.

The spelling of 1421478 in words is "one million, four hundred twenty-one thousand, four hundred seventy-eight".