1234021 has 4 divisors (see below), whose sum is σ = 1236844. Its totient is φ = 1231200.

The previous prime is 1234003. The next prime is 1234039. The reversal of 1234021 is 1204321.

1234021 = 785² + 786².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1204321 = 239 ⋅5039.

It is an interprime number because it is at equal distance from previous prime (1234003) and next prime (1234039).

It can be written as a sum of positive squares in 2 ways, for example, as 616225 + 617796 = 785^2 + 786^2 .

It is a cyclic number.

It is not a de Polignac number, because 1234021 - 2⁹ = 1233509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1233992 and 1234010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234001) 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, 600 + ... + 1681.

It is an arithmetic number, because the mean of its divisors is an integer number (309211).

2^1234021 is an apocalyptic number.

1234021 is the 786-th centered square number.

It is an amenable number.

1234021 is a deficient number, since it is larger than the sum of its proper divisors (2823).

1234021 is an equidigital number, since it uses as much as digits as its factorization.

1234021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1234021 is about 1110.8649782939. The cubic root of 1234021 is about 107.2607551297.

Adding to 1234021 its reverse (1204321), we get a palindrome (2438342).

The spelling of 1234021 in words is "one million, two hundred thirty-four thousand, twenty-one".