1421866 has 4 divisors (see below), whose sum is σ = 2132802. Its totient is φ = 710932.

The previous prime is 1421857. The next prime is 1421867. The reversal of 1421866 is 6681241.

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., 1371241 + 50625 = 1171^2 + 225^2 .

It is not an unprimeable number, because it can be changed into a prime (1421867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355465 + ... + 355468.

2^1421866 is an apocalyptic number.

1421866 is a deficient number, since it is larger than the sum of its proper divisors (710936).

1421866 is an equidigital number, since it uses as much as digits as its factorization.

1421866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710935.

The product of its digits is 2304, while the sum is 28.

The square root of 1421866 is about 1192.4202279398. The cubic root of 1421866 is about 112.4482988773.

The spelling of 1421866 in words is "one million, four hundred twenty-one thousand, eight hundred sixty-six".