161236001 has 2 divisors, whose sum is σ = 161236002. Its totient is φ = 161236000.

The previous prime is 161235983. The next prime is 161236013. The reversal of 161236001 is 100632161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160680976 + 555025 = 12676^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 161236001 - 2⁶ = 161235937 is a prime.

It is not a weakly prime, because it can be changed into another prime (161236021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80618000 + 80618001.

It is an arithmetic number, because the mean of its divisors is an integer number (80618001).

Almost surely, 2^161236001 is an apocalyptic number.

It is an amenable number.

161236001 is a deficient number, since it is larger than the sum of its proper divisors (1).

161236001 is an equidigital number, since it uses as much as digits as its factorization.

161236001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 161236001 is about 12697.8738771497. The cubic root of 161236001 is about 544.2778652291.

Adding to 161236001 its reverse (100632161), we get a palindrome (261868162).

The spelling of 161236001 in words is "one hundred sixty-one million, two hundred thirty-six thousand, one".