144747481 has 2 divisors, whose sum is σ = 144747482. Its totient is φ = 144747480.

The previous prime is 144747479. The next prime is 144747517. The reversal of 144747481 is 184747441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112360000 + 32387481 = 10600^2 + 5691^2 .

It is a cyclic number.

It is not a de Polignac number, because 144747481 - 2¹ = 144747479 is a prime.

It is a super-2 number, since 2×144747481² = 41903666511690722, which contains 22 as substring.

Together with 144747479, it forms a pair of twin primes.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (144747461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72373740 + 72373741.

It is an arithmetic number, because the mean of its divisors is an integer number (72373741).

Almost surely, 2^144747481 is an apocalyptic number.

It is an amenable number.

144747481 is a deficient number, since it is larger than the sum of its proper divisors (1).

144747481 is an equidigital number, since it uses as much as digits as its factorization.

144747481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100352, while the sum is 40.

The square root of 144747481 is about 12031.1047289931. The cubic root of 144747481 is about 525.0536374526.

Subtracting from 144747481 its sum of digits (40), we obtain a palindrome (144747441).

The spelling of 144747481 in words is "one hundred forty-four million, seven hundred forty-seven thousand, four hundred eighty-one".