146109421 has 4 divisors (see below), whose sum is σ = 146570652. Its totient is φ = 145648192.

The previous prime is 146109413. The next prime is 146109437. The reversal of 146109421 is 124901641.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7128900 + 138980521 = 2670^2 + 11789^2 .

It is a cyclic number.

It is not a de Polignac number, because 146109421 - 2³ = 146109413 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 146109421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146109121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230140 + ... + 230773.

It is an arithmetic number, because the mean of its divisors is an integer number (36642663).

Almost surely, 2^146109421 is an apocalyptic number.

It is an amenable number.

146109421 is a deficient number, since it is larger than the sum of its proper divisors (461231).

146109421 is an equidigital number, since it uses as much as digits as its factorization.

146109421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461230.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 146109421 is about 12087.5729987454. The cubic root of 146109421 is about 526.6952559299.

The spelling of 146109421 in words is "one hundred forty-six million, one hundred nine thousand, four hundred twenty-one".