400841 has 8 divisors (see below), whose sum is σ = 462144. Its totient is φ = 340560.

The previous prime is 400837. The next prime is 400849. The reversal of 400841 is 148004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400841 - 2² = 400837 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (400849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1046 + ... + 1376.

It is an arithmetic number, because the mean of its divisors is an integer number (57768).

2⁴⁰⁰⁸⁴¹ is an apocalyptic number.

It is an amenable number.

400841 is a deficient number, since it is larger than the sum of its proper divisors (61303).

400841 is a wasteful number, since it uses less digits than its factorization.

400841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511.

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

The square root of 400841 is about 633.1200518069. The cubic root of 400841 is about 73.7322316670.

Adding to 400841 its reverse (148004), we get a palindrome (548845).

It can be divided in two parts, 400 and 841, that multiplied together give a square (336400 = 580²).

The spelling of 400841 in words is "four hundred thousand, eight hundred forty-one".