1621212 has 12 divisors (see below), whose sum is σ = 3782856. Its totient is φ = 540400.

The previous prime is 1621177. The next prime is 1621219. The reversal of 1621212 is 2121261.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1621191 and 1621200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67539 + ... + 67562.

It is an arithmetic number, because the mean of its divisors is an integer number (315238).

2^1621212 is an apocalyptic number.

1621212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1621212 is an abundant number, since it is smaller than the sum of its proper divisors (2161644).

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

1621212 is a wasteful number, since it uses less digits than its factorization.

1621212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135108 (or 135106 counting only the distinct ones).

The product of its digits is 48, while the sum is 15.

The square root of 1621212 is about 1273.2682356833. The cubic root of 1621212 is about 117.4753109437.

Adding to 1621212 its reverse (2121261), we get a palindrome (3742473).

The spelling of 1621212 in words is "one million, six hundred twenty-one thousand, two hundred twelve".