400250 has 16 divisors (see below), whose sum is σ = 749736. Its totient is φ = 160000.

The previous prime is 400249. The next prime is 400261. The reversal of 400250 is 52004.

It can be written as a sum of positive squares in 4 ways, for example, as 261121 + 139129 = 511^2 + 373^2 .

It is a sliding number, since 400250 = 250 + 400000 and 1/250 + 1/400000 = 0.00400250.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 551 + ... + 1050.

2⁴⁰⁰²⁵⁰ is an apocalyptic number.

400250 is a deficient number, since it is larger than the sum of its proper divisors (349486).

400250 is a wasteful number, since it uses less digits than its factorization.

400250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618 (or 1608 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 400250 is about 632.6531435155. The cubic root of 400250 is about 73.6959769072.

Adding to 400250 its reverse (52004), we get a palindrome (452254).

It can be divided in two parts, 400 and 250, that multiplied together give a 5-th power (100000 = 10⁵).

The spelling of 400250 in words is "four hundred thousand, two hundred fifty".