146122421 has 4 divisors (see below), whose sum is σ = 148124172. Its totient is φ = 144120672.

The previous prime is 146122399. The next prime is 146122439. The reversal of 146122421 is 124221641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124221641 = 2153 ⋅57697.

It can be written as a sum of positive squares in 2 ways, for example, as 48804196 + 97318225 = 6986^2 + 9865^2 .

It is a cyclic number.

It is not a de Polignac number, because 146122421 - 2¹⁸ = 145860277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146122441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000766 + ... + 1000911.

It is an arithmetic number, because the mean of its divisors is an integer number (37031043).

Almost surely, 2^146122421 is an apocalyptic number.

It is an amenable number.

146122421 is a deficient number, since it is larger than the sum of its proper divisors (2001751).

146122421 is an equidigital number, since it uses as much as digits as its factorization.

146122421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001750.

The product of its digits is 768, while the sum is 23.

The square root of 146122421 is about 12088.1107291421. The cubic root of 146122421 is about 526.7108762671.

The spelling of 146122421 in words is "one hundred forty-six million, one hundred twenty-two thousand, four hundred twenty-one".