145447242 has 32 divisors (see below), whose sum is σ = 313336320. Its totient is φ = 44861040.

The previous prime is 145447219. The next prime is 145447249. The reversal of 145447242 is 242744541.

It is not an unprimeable number, because it can be changed into a prime (145447249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9934 + ... + 19737.

It is an arithmetic number, because the mean of its divisors is an integer number (9791760).

Almost surely, 2^145447242 is an apocalyptic number.

145447242 is an abundant number, since it is smaller than the sum of its proper divisors (167889078).

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

145447242 is a wasteful number, since it uses less digits than its factorization.

145447242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29738.

The product of its digits is 35840, while the sum is 33.

The square root of 145447242 is about 12060.1509940796. The cubic root of 145447242 is about 525.8983765663.

The spelling of 145447242 in words is "one hundred forty-five million, four hundred forty-seven thousand, two hundred forty-two".