145230643 has 4 divisors (see below), whose sum is σ = 153773640. Its totient is φ = 136687648.

The previous prime is 145230641. The next prime is 145230649. The reversal of 145230643 is 346032541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346032541 = 19 ⋅18212239.

It is a cyclic number.

It is not a de Polignac number, because 145230643 - 2¹ = 145230641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145230641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4271473 + ... + 4271506.

It is an arithmetic number, because the mean of its divisors is an integer number (38443410).

Almost surely, 2^145230643 is an apocalyptic number.

145230643 is a deficient number, since it is larger than the sum of its proper divisors (8542997).

145230643 is an equidigital number, since it uses as much as digits as its factorization.

145230643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8542996.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 145230643 is about 12051.1677027581. The cubic root of 145230643 is about 525.6371921626.

The spelling of 145230643 in words is "one hundred forty-five million, two hundred thirty thousand, six hundred forty-three".