145252240 has 40 divisors (see below), whose sum is σ = 385957440. Its totient is φ = 49800576.

The previous prime is 145252223. The next prime is 145252259. The reversal of 145252240 is 42252541.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129130 + ... + 130249.

It is an arithmetic number, because the mean of its divisors is an integer number (9648936).

Almost surely, 2^145252240 is an apocalyptic number.

145252240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145252240 is an abundant number, since it is smaller than the sum of its proper divisors (240705200).

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

145252240 is a wasteful number, since it uses less digits than its factorization.

145252240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259399 (or 259393 counting only the distinct ones).

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

The square root of 145252240 is about 12052.0637236948. The cubic root of 145252240 is about 525.6632464065.

The spelling of 145252240 in words is "one hundred forty-five million, two hundred fifty-two thousand, two hundred forty".