1266420 has 24 divisors (see below), whose sum is σ = 3546144. Its totient is φ = 337696.

The previous prime is 1266413. The next prime is 1266431. The reversal of 1266420 is 246621.

It is a happy number.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10494 + ... + 10613.

It is an arithmetic number, because the mean of its divisors is an integer number (147756).

2^1266420 is an apocalyptic number.

1266420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266420 is an abundant number, since it is smaller than the sum of its proper divisors (2279724).

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

1266420 is a wasteful number, since it uses less digits than its factorization.

1266420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21119 (or 21117 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1266420 is about 1125.3532778643. The cubic root of 1266420 is about 108.1913616924.

The spelling of 1266420 in words is "one million, two hundred sixty-six thousand, four hundred twenty".