1066420 has 24 divisors (see below), whose sum is σ = 2274048. Its totient is φ = 420000.

The previous prime is 1066411. The next prime is 1066423. The reversal of 1066420 is 246601.

It is a super-2 number, since 2×1066420² = 2274503232800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1045 + ... + 1795.

It is an arithmetic number, because the mean of its divisors is an integer number (94752).

2^1066420 is an apocalyptic number.

1066420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1066420 is an abundant number, since it is smaller than the sum of its proper divisors (1207628).

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

1066420 is a wasteful number, since it uses less digits than its factorization.

1066420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 829 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1066420 is about 1032.6761350975. The cubic root of 1066420 is about 102.1667144206.

It can be divided in two parts, 10 and 66420, that added together give a triangular number (66430 = T₃₆₄).

The spelling of 1066420 in words is "one million, sixty-six thousand, four hundred twenty".