1040026621 has 2 divisors, whose sum is σ = 1040026622. Its totient is φ = 1040026620.

The previous prime is 1040026619. The next prime is 1040026633. The reversal of 1040026621 is 1266200401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 818760996 + 221265625 = 28614^2 + 14875^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040026621 - 2¹ = 1040026619 is a prime.

Together with 1040026619, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1040026592 and 1040026601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040026601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520013310 + 520013311.

It is an arithmetic number, because the mean of its divisors is an integer number (520013311).

Almost surely, 2^1040026621 is an apocalyptic number.

It is an amenable number.

1040026621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040026621 is an equidigital number, since it uses as much as digits as its factorization.

1040026621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1040026621 is about 32249.4437316367. The cubic root of 1040026621 is about 1013.1680483991.

The spelling of 1040026621 in words is "one billion, forty million, twenty-six thousand, six hundred twenty-one".