144557971 has 2 divisors, whose sum is σ = 144557972. Its totient is φ = 144557970.

The previous prime is 144557939. The next prime is 144557981. The reversal of 144557971 is 179755441.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (179755441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144557971 - 2⁵ = 144557939 is a prime.

It is not a weakly prime, because it can be changed into another prime (144557911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72278985 + 72278986.

It is an arithmetic number, because the mean of its divisors is an integer number (72278986).

Almost surely, 2^144557971 is an apocalyptic number.

144557971 is a deficient number, since it is larger than the sum of its proper divisors (1).

144557971 is an equidigital number, since it uses as much as digits as its factorization.

144557971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 43.

The square root of 144557971 is about 12023.2263140972. The cubic root of 144557971 is about 524.8243959940.

The spelling of 144557971 in words is "one hundred forty-four million, five hundred fifty-seven thousand, nine hundred seventy-one".