146356421 has 4 divisors (see below), whose sum is σ = 146394144. Its totient is φ = 146318700.

The previous prime is 146356409. The next prime is 146356433. The reversal of 146356421 is 124653641.

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 an emirpimes, since its reverse is a distinct semiprime: 124653641 = 7 ⋅17807663.

It is an interprime number because it is at equal distance from previous prime (146356409) and next prime (146356433).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146356421 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 (146356481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12275 + ... + 21056.

It is an arithmetic number, because the mean of its divisors is an integer number (36598536).

Almost surely, 2^146356421 is an apocalyptic number.

It is an amenable number.

146356421 is a deficient number, since it is larger than the sum of its proper divisors (37723).

146356421 is an equidigital number, since it uses as much as digits as its factorization.

146356421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37722.

The product of its digits is 17280, while the sum is 32.

The square root of 146356421 is about 12097.7857891434. The cubic root of 146356421 is about 526.9918840499.

The spelling of 146356421 in words is "one hundred forty-six million, three hundred fifty-six thousand, four hundred twenty-one".