144405457 has 8 divisors (see below), whose sum is σ = 166669632. Its totient is φ = 122550000.

The previous prime is 144405433. The next prime is 144405517. The reversal of 144405457 is 754504441.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144405457 is a prime.

It is a super-2 number, since 2×144405457² = 41705872022757698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144405427) 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, 101419 + ... + 102832.

It is an arithmetic number, because the mean of its divisors is an integer number (20833704).

Almost surely, 2^144405457 is an apocalyptic number.

It is an amenable number.

144405457 is a deficient number, since it is larger than the sum of its proper divisors (22264175).

144405457 is a wasteful number, since it uses less digits than its factorization.

144405457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204359.

The product of its (nonzero) digits is 44800, while the sum is 34.

The square root of 144405457 is about 12016.8821663525. The cubic root of 144405457 is about 524.6397613376.

Adding to 144405457 its reverse (754504441), we get a palindrome (898909898).

The spelling of 144405457 in words is "one hundred forty-four million, four hundred five thousand, four hundred fifty-seven".