401161 has 2 divisors, whose sum is σ = 401162. Its totient is φ = 401160.

The previous prime is 401119. The next prime is 401173. The reversal of 401161 is 161104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291600 + 109561 = 540^2 + 331^2 .

It is a cyclic number.

It is not a de Polignac number, because 401161 - 2¹³ = 392969 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (401101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200580 + 200581.

It is an arithmetic number, because the mean of its divisors is an integer number (200581).

2⁴⁰¹¹⁶¹ is an apocalyptic number.

It is an amenable number.

401161 is a deficient number, since it is larger than the sum of its proper divisors (1).

401161 is an equidigital number, since it uses as much as digits as its factorization.

401161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 401161 is about 633.3727180736. The cubic root of 401161 is about 73.7518471241.

Adding to 401161 its reverse (161104), we get a palindrome (562265).

The spelling of 401161 in words is "four hundred one thousand, one hundred sixty-one".