1421748 has 36 divisors (see below), whose sum is σ = 3649828. Its totient is φ = 466560.

The previous prime is 1421747. The next prime is 1421759. The reversal of 1421748 is 8471241.

It can be written as a sum of positive squares in 2 ways, for example, as 685584 + 736164 = 828^2 + 858^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421741) by changing a digit.

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, 2358 + ... + 2898.

2^1421748 is an apocalyptic number.

1421748 is a gapful number since it is divisible by the number (18) 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 1421748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1824914).

1421748 is an abundant number, since it is smaller than the sum of its proper divisors (2228080).

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

1421748 is a wasteful number, since it uses less digits than its factorization.

1421748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 619 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 1421748 is about 1192.3707477123. The cubic root of 1421748 is about 112.4451881139.

Adding to 1421748 its reverse (8471241), we get a palindrome (9892989).

The spelling of 1421748 in words is "one million, four hundred twenty-one thousand, seven hundred forty-eight".