1136428421 has 2 divisors, whose sum is σ = 1136428422. Its totient is φ = 1136428420.

The previous prime is 1136428379. The next prime is 1136428477. The reversal of 1136428421 is 1248246311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 778689025 + 357739396 = 27905^2 + 18914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1136428421 - 2⁶ = 1136428357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1136428021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 568214210 + 568214211.

It is an arithmetic number, because the mean of its divisors is an integer number (568214211).

Almost surely, 2^1136428421 is an apocalyptic number.

It is an amenable number.

1136428421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1136428421 is an equidigital number, since it uses as much as digits as its factorization.

1136428421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 32.

The square root of 1136428421 is about 33710.9540209114. The cubic root of 1136428421 is about 1043.5518415884.

The spelling of 1136428421 in words is "one billion, one hundred thirty-six million, four hundred twenty-eight thousand, four hundred twenty-one".