1421420 has 96 divisors (see below), whose sum is σ = 4064256. Its totient is φ = 403200.

The previous prime is 1421417. The next prime is 1421437. The reversal of 1421420 is 241241.

1421420 = 105² + 106² + ... + 175².

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1421395 and 1421404.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19985 + ... + 20055.

It is an arithmetic number, because the mean of its divisors is an integer number (42336).

2^1421420 is an apocalyptic number.

1421420 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 1421420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2032128).

1421420 is an abundant number, since it is smaller than the sum of its proper divisors (2642836).

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

1421420 is a wasteful number, since it uses less digits than its factorization.

1421420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1421420 is about 1192.2331986654. The cubic root of 1421420 is about 112.4365403417.

Adding to 1421420 its reverse (241241), we get a palindrome (1662661).

The spelling of 1421420 in words is "one million, four hundred twenty-one thousand, four hundred twenty".