161052421 has 2 divisors, whose sum is σ = 161052422. Its totient is φ = 161052420.

The previous prime is 161052413. The next prime is 161052433. The reversal of 161052421 is 124250161.

161052421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94303521 + 66748900 = 9711^2 + 8170^2 .

It is a cyclic number.

It is not a de Polignac number, because 161052421 - 2³ = 161052413 is a prime.

It is a super-2 number, since 2×161052421² = 51875764619922482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161052392 and 161052401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161052401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80526210 + 80526211.

It is an arithmetic number, because the mean of its divisors is an integer number (80526211).

Almost surely, 2^161052421 is an apocalyptic number.

It is an amenable number.

161052421 is a deficient number, since it is larger than the sum of its proper divisors (1).

161052421 is an equidigital number, since it uses as much as digits as its factorization.

161052421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 161052421 is about 12690.6430491130. The cubic root of 161052421 is about 544.0712189144.

The spelling of 161052421 in words is "one hundred sixty-one million, fifty-two thousand, four hundred twenty-one".