1421871 has 12 divisors (see below), whose sum is σ = 2084376. Its totient is φ = 861520.

The previous prime is 1421867. The next prime is 1421909. The reversal of 1421871 is 1781241.

It is not a de Polignac number, because 1421871 - 2² = 1421867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421801) 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, 1596 + ... + 2321.

It is an arithmetic number, because the mean of its divisors is an integer number (173698).

2^1421871 is an apocalyptic number.

1421871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1421871 is a deficient number, since it is larger than the sum of its proper divisors (662505).

1421871 is a wasteful number, since it uses less digits than its factorization.

1421871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942 (or 3931 counting only the distinct ones).

The product of its digits is 448, while the sum is 24.

The square root of 1421871 is about 1192.4223245143. The cubic root of 1421871 is about 112.4484306855.

The spelling of 1421871 in words is "one million, four hundred twenty-one thousand, eight hundred seventy-one".