1400506 has 12 divisors (see below), whose sum is σ = 2153178. Its totient is φ = 683192.

The previous prime is 1400489. The next prime is 1400507. The reversal of 1400506 is 6050041.

It can be written as a sum of positive squares in only one way, i.e., 1380625 + 19881 = 1175^2 + 141^2 .

It is a super-2 number, since 2×1400506² = 3922834112072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1400506.

It is not an unprimeable number, because it can be changed into a prime (1400507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4260 + ... + 4576.

2^1400506 is an apocalyptic number.

1400506 is a deficient number, since it is larger than the sum of its proper divisors (752672).

1400506 is an equidigital number, since it uses as much as digits as its factorization.

1400506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1400506 is about 1183.4297613293. The cubic root of 1400506 is about 111.8823701230.

Adding to 1400506 its reverse (6050041), we get a palindrome (7450547).

The spelling of 1400506 in words is "one million, four hundred thousand, five hundred six".