144907247 has 4 divisors (see below), whose sum is σ = 147641400. Its totient is φ = 142173096.

The previous prime is 144907241. The next prime is 144907249. The reversal of 144907247 is 742709441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742709441 = 569 ⋅1305289.

It is a cyclic number.

It is not a de Polignac number, because 144907247 - 2⁸ = 144906991 is a prime.

It is a super-2 number, since 2×144907247² = 41996220466238018, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144907247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144907241) 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, 1366997 + ... + 1367102.

It is an arithmetic number, because the mean of its divisors is an integer number (36910350).

Almost surely, 2^144907247 is an apocalyptic number.

144907247 is a deficient number, since it is larger than the sum of its proper divisors (2734153).

144907247 is an equidigital number, since it uses as much as digits as its factorization.

144907247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734152.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 144907247 is about 12037.7426039935. The cubic root of 144907247 is about 525.2467435770.

The spelling of 144907247 in words is "one hundred forty-four million, nine hundred seven thousand, two hundred forty-seven".