1421400 has 96 divisors (see below), whose sum is σ = 4642560. Its totient is φ = 359040.

The previous prime is 1421389. The next prime is 1421401. The reversal of 1421400 is 41241.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13749 + ... + 13851.

It is an arithmetic number, because the mean of its divisors is an integer number (48360).

2^1421400 is an apocalyptic number.

1421400 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 1421400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2321280).

1421400 is an abundant number, since it is smaller than the sum of its proper divisors (3221160).

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

1421400 is a wasteful number, since it uses less digits than its factorization.

1421400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1421400 is about 1192.2248110151. The cubic root of 1421400 is about 112.4360129955.

Adding to 1421400 its reverse (41241), we get a palindrome (1462641).

The spelling of 1421400 in words is "one million, four hundred twenty-one thousand, four hundred".