1248421 has 4 divisors (see below), whose sum is σ = 1291500. Its totient is φ = 1205344.

The previous prime is 1248413. The next prime is 1248427.

1248421 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 923521 + 324900 = 961^2 + 570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1248421 - 2³ = 1248413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1248392 and 1248401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1248427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21496 + ... + 21553.

It is an arithmetic number, because the mean of its divisors is an integer number (322875).

2^1248421 is an apocalyptic number.

It is an amenable number.

1248421 is a deficient number, since it is larger than the sum of its proper divisors (43079).

1248421 is an equidigital number, since it uses as much as digits as its factorization.

1248421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43078.

The product of its digits is 512, while the sum is 22.

The square root of 1248421 is about 1117.3276153394. The cubic root of 1248421 is about 107.6763573578.

The spelling of 1248421 in words is "one million, two hundred forty-eight thousand, four hundred twenty-one".