1421648 has 10 divisors (see below), whose sum is σ = 2754474. Its totient is φ = 710816.

The previous prime is 1421647. The next prime is 1421663. The reversal of 1421648 is 8461241.

It can be written as a sum of positive squares in only one way, i.e., 1420864 + 784 = 1192^2 + 28^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44411 + ... + 44442.

2^1421648 is an apocalyptic number.

It is an amenable number.

1421648 is a deficient number, since it is larger than the sum of its proper divisors (1332826).

1421648 is an equidigital number, since it uses as much as digits as its factorization.

1421648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88861 (or 88855 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 1421648 is about 1192.3288137087. The cubic root of 1421648 is about 112.4425517389.

Adding to 1421648 its reverse (8461241), we get a palindrome (9882889).

The spelling of 1421648 in words is "one million, four hundred twenty-one thousand, six hundred forty-eight".