160135621 has 2 divisors, whose sum is σ = 160135622. Its totient is φ = 160135620.

The previous prime is 160135609. The next prime is 160135643. The reversal of 160135621 is 126531061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134884996 + 25250625 = 11614^2 + 5025^2 .

It is a cyclic number.

It is not a de Polignac number, because 160135621 - 2⁹ = 160135109 is a prime.

It is a super-2 number, since 2×160135621² = 51286834226111282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (160135321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80067810 + 80067811.

It is an arithmetic number, because the mean of its divisors is an integer number (80067811).

Almost surely, 2^160135621 is an apocalyptic number.

It is an amenable number.

160135621 is a deficient number, since it is larger than the sum of its proper divisors (1).

160135621 is an equidigital number, since it uses as much as digits as its factorization.

160135621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 160135621 is about 12654.4703958720. The cubic root of 160135621 is about 543.0368683470.

Adding to 160135621 its reverse (126531061), we get a palindrome (286666682).

The spelling of 160135621 in words is "one hundred sixty million, one hundred thirty-five thousand, six hundred twenty-one".