400507 has 4 divisors (see below), whose sum is σ = 403216. Its totient is φ = 397800.

The previous prime is 400481. The next prime is 400523. The reversal of 400507 is 705004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400507 - 2¹¹ = 398459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1119 + ... + 1432.

It is an arithmetic number, because the mean of its divisors is an integer number (100804).

2⁴⁰⁰⁵⁰⁷ is an apocalyptic number.

400507 is a deficient number, since it is larger than the sum of its proper divisors (2709).

400507 is a wasteful number, since it uses less digits than its factorization.

400507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2708.

The product of its (nonzero) digits is 140, while the sum is 16.

The square root of 400507 is about 632.8562237981. The cubic root of 400507 is about 73.7117468958.

The spelling of 400507 in words is "four hundred thousand, five hundred seven".