1421000 has 96 divisors (see below), whose sum is σ = 4001400. Its totient is φ = 470400.

The previous prime is 1420999. The next prime is 1421011. The reversal of 1421000 is 1241.

1421000 = 148² + 149² + ... + 195².

It can be written as a sum of positive squares in 4 ways, for example, as 432964 + 988036 = 658^2 + 994^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an Ulam 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 23 ways as a sum of consecutive naturals, for example, 48986 + ... + 49014.

2^1421000 is an apocalyptic number.

1421000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2000700).

1421000 is an abundant number, since it is smaller than the sum of its proper divisors (2580400).

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

1421000 is a wasteful number, since it uses less digits than its factorization.

1421000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64 (or 43 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1421000 is about 1192.0570456148. The cubic root of 1421000 is about 112.4254650323.

Adding to 1421000 its reverse (1241), we get a palindrome (1422241).

The spelling of 1421000 in words is "one million, four hundred twenty-one thousand".