146004431 has 4 divisors (see below), whose sum is σ = 146445864. Its totient is φ = 145563000.

The previous prime is 146004421. The next prime is 146004487. The reversal of 146004431 is 134400641.

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

It is a cyclic number.

It is not a de Polignac number, because 146004431 - 2¹⁴ = 145988047 is a prime.

It is a super-2 number, since 2×146004431² = 42634587743267522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 146004397 and 146004406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146004421) 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, 220220 + ... + 220881.

It is an arithmetic number, because the mean of its divisors is an integer number (36611466).

Almost surely, 2^146004431 is an apocalyptic number.

146004431 is a deficient number, since it is larger than the sum of its proper divisors (441433).

146004431 is an equidigital number, since it uses as much as digits as its factorization.

146004431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441432.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 146004431 is about 12083.2293282880. The cubic root of 146004431 is about 526.5690697129.

The spelling of 146004431 in words is "one hundred forty-six million, four thousand, four hundred thirty-one".