145509843 has 4 divisors (see below), whose sum is σ = 194013128. Its totient is φ = 97006560.

The previous prime is 145509803. The next prime is 145509853. The reversal of 145509843 is 348905541.

145509843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 348905541 = 3 ⋅116301847.

It is not a de Polignac number, because 145509843 - 2¹⁰ = 145508819 is a prime.

It is a super-2 number, since 2×145509843² = 42346228819769298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145509803) 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, 24251638 + ... + 24251643.

It is an arithmetic number, because the mean of its divisors is an integer number (48503282).

Almost surely, 2^145509843 is an apocalyptic number.

145509843 is a deficient number, since it is larger than the sum of its proper divisors (48503285).

145509843 is an equidigital number, since it uses as much as digits as its factorization.

145509843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48503284.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 145509843 is about 12062.7460803915. The cubic root of 145509843 is about 525.9738152425.

The spelling of 145509843 in words is "one hundred forty-five million, five hundred nine thousand, eight hundred forty-three".