145253240 has 48 divisors (see below), whose sum is σ = 359243640. Its totient is φ = 52817600.

The previous prime is 145253209. The next prime is 145253243. The reversal of 145253240 is 42352541.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145253243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10166 + ... + 19845.

Almost surely, 2^145253240 is an apocalyptic number.

145253240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145253240 is an abundant number, since it is smaller than the sum of its proper divisors (213990400).

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

145253240 is a wasteful number, since it uses less digits than its factorization.

145253240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30044 (or 30029 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 145253240 is about 12052.1052102942. The cubic root of 145253240 is about 525.6644527265.

The spelling of 145253240 in words is "one hundred forty-five million, two hundred fifty-three thousand, two hundred forty".