144070721 has 2 divisors, whose sum is σ = 144070722. Its totient is φ = 144070720.

The previous prime is 144070697. The next prime is 144070739. The reversal of 144070721 is 127070441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75777025 + 68293696 = 8705^2 + 8264^2 .

It is an emirp because it is prime and its reverse (127070441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144070721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (144070921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72035360 + 72035361.

It is an arithmetic number, because the mean of its divisors is an integer number (72035361).

Almost surely, 2^144070721 is an apocalyptic number.

It is an amenable number.

144070721 is a deficient number, since it is larger than the sum of its proper divisors (1).

144070721 is an equidigital number, since it uses as much as digits as its factorization.

144070721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 144070721 is about 12002.9463466267. The cubic root of 144070721 is about 524.2340710265.

The spelling of 144070721 in words is "one hundred forty-four million, seventy thousand, seven hundred twenty-one".