1421136 has 60 divisors (see below), whose sum is σ = 4062240. Its totient is φ = 463680.

The previous prime is 1421113. The next prime is 1421141. The reversal of 1421136 is 6311241.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a zygodrome in base 4.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 10155 + ... + 10293.

It is an arithmetic number, because the mean of its divisors is an integer number (67704).

2^1421136 is an apocalyptic number.

1421136 is a gapful number since it is divisible by the number (16) 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 1421136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2031120).

1421136 is an abundant number, since it is smaller than the sum of its proper divisors (2641104).

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

1421136 is a wasteful number, since it uses less digits than its factorization.

1421136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 215 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1421136 is about 1192.1140884999. The cubic root of 1421136 is about 112.4290515619.

Adding to 1421136 its reverse (6311241), we get a palindrome (7732377).

The spelling of 1421136 in words is "one million, four hundred twenty-one thousand, one hundred thirty-six".