144745257 has 8 divisors (see below), whose sum is σ = 193207360. Its totient is φ = 96390000.

The previous prime is 144745247. The next prime is 144745283. The reversal of 144745257 is 752547441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 144745257 - 2⁶ = 144745193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144745217) 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, 23494 + ... + 29007.

It is an arithmetic number, because the mean of its divisors is an integer number (24150920).

Almost surely, 2^144745257 is an apocalyptic number.

It is an amenable number.

144745257 is a deficient number, since it is larger than the sum of its proper divisors (48462103).

144745257 is an equidigital number, since it uses as much as digits as its factorization.

144745257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53423.

The product of its digits is 156800, while the sum is 39.

The square root of 144745257 is about 12031.0123015480. The cubic root of 144745257 is about 525.0509483436.

The spelling of 144745257 in words is "one hundred forty-four million, seven hundred forty-five thousand, two hundred fifty-seven".