144005657 has 8 divisors (see below), whose sum is σ = 152605800. Its totient is φ = 135419904.

The previous prime is 144005651. The next prime is 144005707. The reversal of 144005657 is 756500441.

It can be written as a sum of positive squares in 4 ways, for example, as 56190016 + 87815641 = 7496^2 + 9371^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 144005657 - 2⁶ = 144005593 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (144005651) 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, 22469 + ... + 28157.

It is an arithmetic number, because the mean of its divisors is an integer number (19075725).

Almost surely, 2^144005657 is an apocalyptic number.

144005657 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

144005657 is a deficient number, since it is larger than the sum of its proper divisors (8600143).

144005657 is a wasteful number, since it uses less digits than its factorization.

144005657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7195.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 144005657 is about 12000.2357060184. The cubic root of 144005657 is about 524.1551424251.

The spelling of 144005657 in words is "one hundred forty-four million, five thousand, six hundred fifty-seven".