1400018 has 8 divisors (see below), whose sum is σ = 2223612. Its totient is φ = 658816.

The previous prime is 1400017. The next prime is 1400023. The reversal of 1400018 is 8100041.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1399489 + 529 = 1183^2 + 23^2 .

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

1400018 is a modest number, since divided by 18 gives 14 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1399975 and 1400011.

It is not an unprimeable number, because it can be changed into a prime (1400017) 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, 20555 + ... + 20622.

2^1400018 is an apocalyptic number.

1400018 is a deficient number, since it is larger than the sum of its proper divisors (823594).

1400018 is a wasteful number, since it uses less digits than its factorization.

1400018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41196.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1400018 is about 1183.2235629838. The cubic root of 1400018 is about 111.8693736442.

Adding to 1400018 its reverse (8100041), we get a palindrome (9500059).

The spelling of 1400018 in words is "one million, four hundred thousand, eighteen".