145442240 has 28 divisors (see below), whose sum is σ = 346335096. Its totient is φ = 58176768.

The previous prime is 145442237. The next prime is 145442249. The reversal of 145442240 is 42244541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145442249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226934 + ... + 227573.

Almost surely, 2^145442240 is an apocalyptic number.

145442240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145442240 is an abundant number, since it is smaller than the sum of its proper divisors (200892856).

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

145442240 is an equidigital number, since it uses as much as digits as its factorization.

145442240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454524 (or 454514 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 145442240 is about 12059.9436151252. The cubic root of 145442240 is about 525.8923478652.

Adding to 145442240 its reverse (42244541), we get a palindrome (187686781).

The spelling of 145442240 in words is "one hundred forty-five million, four hundred forty-two thousand, two hundred forty".