400501 has 8 divisors (see below), whose sum is σ = 427680. Its totient is φ = 373968.

The previous prime is 400481. The next prime is 400523. The reversal of 400501 is 105004.

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 400501 - 2⁹ = 399989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400601) 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, 1935 + ... + 2131.

It is an arithmetic number, because the mean of its divisors is an integer number (53460).

2⁴⁰⁰⁵⁰¹ is an apocalyptic number.

It is an amenable number.

400501 is a deficient number, since it is larger than the sum of its proper divisors (27179).

400501 is a wasteful number, since it uses less digits than its factorization.

400501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 400501 is about 632.8514833671. The cubic root of 400501 is about 73.7113788018.

Adding to 400501 its reverse (105004), we get a palindrome (505505).

The spelling of 400501 in words is "four hundred thousand, five hundred one".