401425501 has 2 divisors, whose sum is σ = 401425502. Its totient is φ = 401425500.

The previous prime is 401425499. The next prime is 401425513. The reversal of 401425501 is 105524104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373494276 + 27931225 = 19326^2 + 5285^2 .

It is a cyclic number.

It is not a de Polignac number, because 401425501 - 2¹ = 401425499 is a prime.

It is a super-2 number, since 2×401425501² = 322284865706202002, which contains 22 as substring.

Together with 401425499, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401425561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200712750 + 200712751.

It is an arithmetic number, because the mean of its divisors is an integer number (200712751).

Almost surely, 2^401425501 is an apocalyptic number.

It is an amenable number.

401425501 is a deficient number, since it is larger than the sum of its proper divisors (1).

401425501 is an equidigital number, since it uses as much as digits as its factorization.

401425501 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 401425501 is about 20035.6058306206. The cubic root of 401425501 is about 737.6805271366.

Adding to 401425501 its reverse (105524104), we get a palindrome (506949605).

The spelling of 401425501 in words is "four hundred one million, four hundred twenty-five thousand, five hundred one".