1400866 has 4 divisors (see below), whose sum is σ = 2101302. Its totient is φ = 700432.

The previous prime is 1400863. The next prime is 1400873. The reversal of 1400866 is 6680041.

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

It can be written as a sum of positive squares in only one way, i.e., 950625 + 450241 = 975^2 + 671^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1400866.

It is not an unprimeable number, because it can be changed into a prime (1400863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 350215 + ... + 350218.

2^1400866 is an apocalyptic number.

1400866 is a deficient number, since it is larger than the sum of its proper divisors (700436).

1400866 is an equidigital number, since it uses as much as digits as its factorization.

1400866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700435.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1400866 is about 1183.5818518379. The cubic root of 1400866 is about 111.8919557543.

The spelling of 1400866 in words is "one million, four hundred thousand, eight hundred sixty-six".