146431621 has 8 divisors (see below), whose sum is σ = 167715584. Its totient is φ = 125238960.

The previous prime is 146431619. The next prime is 146431657. The reversal of 146431621 is 126134641.

146431621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 146431621 - 2¹ = 146431619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 146431621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146434621) 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, 19350 + ... + 25831.

It is an arithmetic number, because the mean of its divisors is an integer number (20964448).

Almost surely, 2^146431621 is an apocalyptic number.

It is an amenable number.

146431621 is a deficient number, since it is larger than the sum of its proper divisors (21283963).

146431621 is an equidigital number, since it uses as much as digits as its factorization.

146431621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45651.

The product of its digits is 3456, while the sum is 28.

The square root of 146431621 is about 12100.8933967703. The cubic root of 146431621 is about 527.0821272245.

The spelling of 146431621 in words is "one hundred forty-six million, four hundred thirty-one thousand, six hundred twenty-one".