1621162 has 4 divisors (see below), whose sum is σ = 2431746. Its totient is φ = 810580.

The previous prime is 1621153. The next prime is 1621163. The reversal of 1621162 is 2611261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2611261 = 43 ⋅60727.

It can be written as a sum of positive squares in only one way, i.e., 1490841 + 130321 = 1221^2 + 361^2 .

It is not an unprimeable number, because it can be changed into a prime (1621163) by changing a digit.

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 as a sum of consecutive naturals, namely, 405289 + ... + 405292.

2^1621162 is an apocalyptic number.

1621162 is a deficient number, since it is larger than the sum of its proper divisors (810584).

1621162 is an equidigital number, since it uses as much as digits as its factorization.

1621162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810583.

The product of its digits is 144, while the sum is 19.

The square root of 1621162 is about 1273.2486010202. The cubic root of 1621162 is about 117.4741032411.

Subtracting 1621162 from its reverse (2611261), we obtain a palindrome (990099).

The spelling of 1621162 in words is "one million, six hundred twenty-one thousand, one hundred sixty-two".