1436428561 has 2 divisors, whose sum is σ = 1436428562. Its totient is φ = 1436428560.

The previous prime is 1436428559. The next prime is 1436428577. The reversal of 1436428561 is 1658246341.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1291683600 + 144744961 = 35940^2 + 12031^2 .

It is a cyclic number.

It is not a de Polignac number, because 1436428561 - 2¹ = 1436428559 is a prime.

Together with 1436428559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1436428501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 718214280 + 718214281.

It is an arithmetic number, because the mean of its divisors is an integer number (718214281).

Almost surely, 2^1436428561 is an apocalyptic number.

It is an amenable number.

1436428561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1436428561 is an equidigital number, since it uses as much as digits as its factorization.

1436428561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 40.

The square root of 1436428561 is about 37900.2448672828. The cubic root of 1436428561 is about 1128.3088915740.

The spelling of 1436428561 in words is "one billion, four hundred thirty-six million, four hundred twenty-eight thousand, five hundred sixty-one".