145603540 has 24 divisors (see below), whose sum is σ = 306060552. Its totient is φ = 58185600.

The previous prime is 145603511. The next prime is 145603541. The reversal of 145603540 is 45306541.

It can be written as a sum of positive squares in 4 ways, for example, as 45643536 + 99960004 = 6756^2 + 9998^2 .

It is a junction number, because it is equal to n+sod(n) for n = 145603499 and 145603508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145603541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22690 + ... + 28390.

It is an arithmetic number, because the mean of its divisors is an integer number (12752523).

Almost surely, 2^145603540 is an apocalyptic number.

145603540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145603540 is an abundant number, since it is smaller than the sum of its proper divisors (160457012).

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

145603540 is a wasteful number, since it uses less digits than its factorization.

145603540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6987 (or 6985 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 145603540 is about 12066.6291896287. The cubic root of 145603540 is about 526.0866864026.

The spelling of 145603540 in words is "one hundred forty-five million, six hundred three thousand, five hundred forty".