1421020 has 24 divisors (see below), whose sum is σ = 3006864. Its totient is φ = 564096.

The previous prime is 1421011. The next prime is 1421027. The reversal of 1421020 is 201241.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1420988 and 1421006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4384 + ... + 4696.

It is an arithmetic number, because the mean of its divisors is an integer number (125286).

2^1421020 is an apocalyptic number.

1421020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421020 is an abundant number, since it is smaller than the sum of its proper divisors (1585844).

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

1421020 is a wasteful number, since it uses less digits than its factorization.

1421020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1421020 is about 1192.0654344456. The cubic root of 1421020 is about 112.4259924775.

Adding to 1421020 its reverse (201241), we get a palindrome (1622261).

The spelling of 1421020 in words is "one million, four hundred twenty-one thousand, twenty".