401425243 has 2 divisors, whose sum is σ = 401425244. Its totient is φ = 401425242.

The previous prime is 401425229. The next prime is 401425289. The reversal of 401425243 is 342524104.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401425243 is a prime.

It is a super-2 number, since 2×401425243² = 322284451435218098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401425643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200712621 + 200712622.

It is an arithmetic number, because the mean of its divisors is an integer number (200712622).

Almost surely, 2^401425243 is an apocalyptic number.

401425243 is a deficient number, since it is larger than the sum of its proper divisors (1).

401425243 is an equidigital number, since it uses as much as digits as its factorization.

401425243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 401425243 is about 20035.5993920821. The cubic root of 401425243 is about 737.6803690984.

Adding to 401425243 its reverse (342524104), we get a palindrome (743949347).

The spelling of 401425243 in words is "four hundred one million, four hundred twenty-five thousand, two hundred forty-three".