1420866 has 24 divisors (see below), whose sum is σ = 3102060. Its totient is φ = 470016.

The previous prime is 1420847. The next prime is 1420879. The reversal of 1420866 is 6680241.

It can be written as a sum of positive squares in 2 ways, for example, as 1404225 + 16641 = 1185^2 + 129^2 .

It is an Ulam number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3270 + ... + 3678.

2^1420866 is an apocalyptic number.

1420866 is an abundant number, since it is smaller than the sum of its proper divisors (1681194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1420866 is a wasteful number, since it uses less digits than its factorization.

1420866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1420866 is about 1192.0008389259. Note that the first 3 decimals coincide. The cubic root of 1420866 is about 112.4219310220.

The spelling of 1420866 in words is "one million, four hundred twenty thousand, eight hundred sixty-six".