1421856 has 36 divisors (see below), whose sum is σ = 4044222. Its totient is φ = 473856.

The previous prime is 1421813. The next prime is 1421857. The reversal of 1421856 is 6581241.

It can be written as a sum of positive squares in only one way, i.e., 1245456 + 176400 = 1116^2 + 420^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1421857) 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, 2181 + ... + 2756.

2^1421856 is an apocalyptic number.

1421856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1421856 is an abundant number, since it is smaller than the sum of its proper divisors (2622366).

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

1421856 is a wasteful number, since it uses less digits than its factorization.

1421856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4953 (or 4942 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1421856 is about 1192.4160347798. The cubic root of 1421856 is about 112.4480352600.

The spelling of 1421856 in words is "one million, four hundred twenty-one thousand, eight hundred fifty-six".