145843540 has 12 divisors (see below), whose sum is σ = 306271476. Its totient is φ = 58337408.

The previous prime is 145843531. The next prime is 145843541. The reversal of 145843540 is 45348541.

It can be written as a sum of positive squares in 2 ways, for example, as 25765776 + 120077764 = 5076^2 + 10958^2 .

It is a junction number, because it is equal to n+sod(n) for n = 145843496 and 145843505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145843541) 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, 3646069 + ... + 3646108.

It is an arithmetic number, because the mean of its divisors is an integer number (25522623).

Almost surely, 2^145843540 is an apocalyptic number.

145843540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145843540 is an abundant number, since it is smaller than the sum of its proper divisors (160427936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145843540 is a wasteful number, since it uses less digits than its factorization.

145843540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7292186 (or 7292184 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 145843540 is about 12076.5698772458. The cubic root of 145843540 is about 526.3755793234.

The spelling of 145843540 in words is "one hundred forty-five million, eight hundred forty-three thousand, five hundred forty".