405125401 has 2 divisors, whose sum is σ = 405125402. Its totient is φ = 405125400.

The previous prime is 405125377. The next prime is 405125431. The reversal of 405125401 is 104521504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344659225 + 60466176 = 18565^2 + 7776^2 .

It is a cyclic number.

It is not a de Polignac number, because 405125401 - 2¹¹ = 405123353 is a prime.

It is not a weakly prime, because it can be changed into another prime (405125431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202562700 + 202562701.

It is an arithmetic number, because the mean of its divisors is an integer number (202562701).

Almost surely, 2^405125401 is an apocalyptic number.

It is an amenable number.

405125401 is a deficient number, since it is larger than the sum of its proper divisors (1).

405125401 is an equidigital number, since it uses as much as digits as its factorization.

405125401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 405125401 is about 20127.7271692558. The cubic root of 405125401 is about 739.9399762612.

Adding to 405125401 its reverse (104521504), we get a palindrome (509646905).

The spelling of 405125401 in words is "four hundred five million, one hundred twenty-five thousand, four hundred one".