1040534021 has 2 divisors, whose sum is σ = 1040534022. Its totient is φ = 1040534020.

The previous prime is 1040534009. The next prime is 1040534023. The reversal of 1040534021 is 1204350401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1040385025 + 148996 = 32255^2 + 386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040534021 - 2¹⁴ = 1040517637 is a prime.

It is a super-2 number, since 2×1040534021² = 2165422097716856882, which contains 22 as substring.

Together with 1040534023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1040533984 and 1040534002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040534023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520267010 + 520267011.

It is an arithmetic number, because the mean of its divisors is an integer number (520267011).

Almost surely, 2^1040534021 is an apocalyptic number.

It is an amenable number.

1040534021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040534021 is an equidigital number, since it uses as much as digits as its factorization.

1040534021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1040534021 is about 32257.3095747305. The cubic root of 1040534021 is about 1013.3327870953.

Adding to 1040534021 its reverse (1204350401), we get a palindrome (2244884422).

The spelling of 1040534021 in words is "one billion, forty million, five hundred thirty-four thousand, twenty-one".