145504240 has 40 divisors (see below), whose sum is σ = 386627040. Its totient is φ = 49886976.

The previous prime is 145504213. The next prime is 145504243. The reversal of 145504240 is 42405541.

It is a happy number.

145504240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145504243) 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, 129355 + ... + 130474.

It is an arithmetic number, because the mean of its divisors is an integer number (9665676).

Almost surely, 2^145504240 is an apocalyptic number.

145504240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145504240 is an abundant number, since it is smaller than the sum of its proper divisors (241122800).

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

145504240 is a wasteful number, since it uses less digits than its factorization.

145504240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259849 (or 259843 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 145504240 is about 12062.5138341890. The cubic root of 145504240 is about 525.9670641090.

Adding to 145504240 its reverse (42405541), we get a palindrome (187909781).

The spelling of 145504240 in words is "one hundred forty-five million, five hundred four thousand, two hundred forty".