1620012 has 24 divisors (see below), whose sum is σ = 3813376. Its totient is φ = 535248.

The previous prime is 1620001. The next prime is 1620013. The reversal of 1620012 is 2100261.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1620012.

It is not an unprimeable number, because it can be changed into a prime (1620013) 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, 993 + ... + 2055.

2^1620012 is an apocalyptic number.

1620012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1620012 is an abundant number, since it is smaller than the sum of its proper divisors (2193364).

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

1620012 is a wasteful number, since it uses less digits than its factorization.

1620012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197 (or 1195 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1620012 is about 1272.7969201723. The cubic root of 1620012 is about 117.4463192245.

Adding to 1620012 its reverse (2100261), we get a palindrome (3720273).

Subtracting 1620012 from its reverse (2100261), we obtain a square (480249 = 693²).

The spelling of 1620012 in words is "one million, six hundred twenty thousand, twelve".