400481 has 2 divisors, whose sum is σ = 400482. Its totient is φ = 400480.

The previous prime is 400471. The next prime is 400523. The reversal of 400481 is 184004.

It is a happy number.

400481 is nontrivially palindromic in base 8.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 379456 + 21025 = 616^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 400481 - 2⁶ = 400417 is a prime.

It is a super-2 number, since 2×400481² = 320770062722, which contains 22 as substring.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 400481.

It is not a weakly prime, because it can be changed into another prime (400441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200240 + 200241.

It is an arithmetic number, because the mean of its divisors is an integer number (200241).

2⁴⁰⁰⁴⁸¹ is an apocalyptic number.

It is an amenable number.

400481 is a deficient number, since it is larger than the sum of its proper divisors (1).

400481 is an equidigital number, since it uses as much as digits as its factorization.

400481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 400481 is about 632.8356816742. The cubic root of 400481 is about 73.7101517952.

Adding to 400481 its reverse (184004), we get a palindrome (584485).

The spelling of 400481 in words is "four hundred thousand, four hundred eighty-one".