1421855 has 8 divisors (see below), whose sum is σ = 1716000. Its totient is φ = 1130976.

The previous prime is 1421813. The next prime is 1421857. The reversal of 1421855 is 5581241.

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

It is a cyclic number.

It is not a de Polignac number, because 1421855 - 2¹⁰ = 1420831 is a prime.

It is an Ulam number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 281 + ... + 1709.

It is an arithmetic number, because the mean of its divisors is an integer number (214500).

2^1421855 is an apocalyptic number.

1421855 is a deficient number, since it is larger than the sum of its proper divisors (294145).

1421855 is a wasteful number, since it uses less digits than its factorization.

1421855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633.

The product of its digits is 1600, while the sum is 26.

The square root of 1421855 is about 1192.4156154630. The cubic root of 1421855 is about 112.4480088982.

The spelling of 1421855 in words is "one million, four hundred twenty-one thousand, eight hundred fifty-five".