1052021 has 4 divisors (see below), whose sum is σ = 1080492. Its totient is φ = 1023552.

The previous prime is 1051991. The next prime is 1052027. The reversal of 1052021 is 1202501.

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 703921 + 348100 = 839^2 + 590^2 .

It is a cyclic number.

It is not a de Polignac number, because 1052021 - 2⁶ = 1051957 is a prime.

It is a super-2 number, since 2×1052021² = 2213496368882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1051993 and 1052011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1052027) 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, 14180 + ... + 14253.

It is an arithmetic number, because the mean of its divisors is an integer number (270123).

2^1052021 is an apocalyptic number.

It is an amenable number.

1052021 is a deficient number, since it is larger than the sum of its proper divisors (28471).

1052021 is an equidigital number, since it uses as much as digits as its factorization.

1052021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28470.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1052021 is about 1025.6807495512. The cubic root of 1052021 is about 101.7048045874.

Adding to 1052021 its reverse (1202501), we get a palindrome (2254522).

The spelling of 1052021 in words is "one million, fifty-two thousand, twenty-one".