146621 has 4 divisors (see below), whose sum is σ = 147744. Its totient is φ = 145500.

The previous prime is 146617. The next prime is 146639. The reversal of 146621 is 126641.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 146621 - 2² = 146617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 146593 and 146602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146681) 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 in 3 ways as a sum of consecutive naturals, for example, 335 + ... + 636.

It is an arithmetic number, because the mean of its divisors is an integer number (36936).

2¹⁴⁶⁶²¹ is an apocalyptic number.

It is an amenable number.

146621 is a deficient number, since it is larger than the sum of its proper divisors (1123).

146621 is an equidigital number, since it uses as much as digits as its factorization.

146621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122.

The product of its digits is 288, while the sum is 20.

The square root of 146621 is about 382.9112168636. The cubic root of 146621 is about 52.7309253226.

Adding to 146621 its sum of digits (20), we get a palindrome (146641).

It can be divided in two parts, 146 and 621, that added together give a palindrome (767).

The spelling of 146621 in words is "one hundred forty-six thousand, six hundred twenty-one".