145540543 has 4 divisors (see below), whose sum is σ = 147175920. Its totient is φ = 143905168.

The previous prime is 145540541. The next prime is 145540547. The reversal of 145540543 is 345045541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345045541 = 11597 ⋅29753.

It is not a de Polignac number, because 145540543 - 2¹ = 145540541 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 (145540541) 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, 817555 + ... + 817732.

It is an arithmetic number, because the mean of its divisors is an integer number (36793980).

Almost surely, 2^145540543 is an apocalyptic number.

145540543 is a deficient number, since it is larger than the sum of its proper divisors (1635377).

145540543 is an equidigital number, since it uses as much as digits as its factorization.

145540543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635376.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 145540543 is about 12064.0185261794. The cubic root of 145540543 is about 526.0108030281.

The spelling of 145540543 in words is "one hundred forty-five million, five hundred forty thousand, five hundred forty-three".