1036128421 has 2 divisors, whose sum is σ = 1036128422. Its totient is φ = 1036128420.

The previous prime is 1036128391. The next prime is 1036128437. The reversal of 1036128421 is 1248216301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 556299396 + 479829025 = 23586^2 + 21905^2 .

It is a cyclic number.

It is not a de Polignac number, because 1036128421 - 2⁵ = 1036128389 is a prime.

It is a super-3 number, since 3×1036128421³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1036128421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1036128451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 518064210 + 518064211.

It is an arithmetic number, because the mean of its divisors is an integer number (518064211).

Almost surely, 2^1036128421 is an apocalyptic number.

It is an amenable number.

1036128421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1036128421 is an equidigital number, since it uses as much as digits as its factorization.

1036128421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1036128421 is about 32188.9487402121. The cubic root of 1036128421 is about 1011.9006204259.

The spelling of 1036128421 in words is "one billion, thirty-six million, one hundred twenty-eight thousand, four hundred twenty-one".