145431943 has 4 divisors (see below), whose sum is σ = 150123328. Its totient is φ = 140740560.

The previous prime is 145431919. The next prime is 145431953. The reversal of 145431943 is 349134541.

145431943 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: 349134541 = 7 ⋅49876363.

It is a cyclic number.

It is not a de Polignac number, because 145431943 - 2⁵ = 145431911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145431899 and 145431908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145431953) 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, 2345646 + ... + 2345707.

It is an arithmetic number, because the mean of its divisors is an integer number (37530832).

Almost surely, 2^145431943 is an apocalyptic number.

145431943 is a deficient number, since it is larger than the sum of its proper divisors (4691385).

145431943 is an equidigital number, since it uses as much as digits as its factorization.

145431943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4691384.

The product of its digits is 25920, while the sum is 34.

The square root of 145431943 is about 12059.5166984419. The cubic root of 145431943 is about 525.8799368872.

The spelling of 145431943 in words is "one hundred forty-five million, four hundred thirty-one thousand, nine hundred forty-three".