144815457 has 4 divisors (see below), whose sum is σ = 193087280. Its totient is φ = 96543636.

The previous prime is 144815431. The next prime is 144815459. The reversal of 144815457 is 754518441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 144815457 - 2⁸ = 144815201 is a prime.

It is a super-2 number, since 2×144815457² = 41943033172237698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144815459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24135907 + ... + 24135912.

It is an arithmetic number, because the mean of its divisors is an integer number (48271820).

Almost surely, 2^144815457 is an apocalyptic number.

It is an amenable number.

144815457 is a deficient number, since it is larger than the sum of its proper divisors (48271823).

144815457 is an equidigital number, since it uses as much as digits as its factorization.

144815457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48271822.

The product of its digits is 89600, while the sum is 39.

The square root of 144815457 is about 12033.9294081360. The cubic root of 144815457 is about 525.1358161089.

The spelling of 144815457 in words is "one hundred forty-four million, eight hundred fifteen thousand, four hundred fifty-seven".