1621466 has 16 divisors (see below), whose sum is σ = 3032640. Its totient is φ = 631680.

The previous prime is 1621457. The next prime is 1621469. The reversal of 1621466 is 6641261.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1621469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5111 + ... + 5418.

It is an arithmetic number, because the mean of its divisors is an integer number (189540).

2^1621466 is an apocalyptic number.

1621466 is a deficient number, since it is larger than the sum of its proper divisors (1411174).

1621466 is a wasteful number, since it uses less digits than its factorization.

1621466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10549.

The product of its digits is 1728, while the sum is 26.

The square root of 1621466 is about 1273.3679750960. The cubic root of 1621466 is about 117.4814456895.

The spelling of 1621466 in words is "one million, six hundred twenty-one thousand, four hundred sixty-six".