145259729 has 2 divisors, whose sum is σ = 145259730. Its totient is φ = 145259728.

The previous prime is 145259687. The next prime is 145259791. The reversal of 145259729 is 927952541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145250704 + 9025 = 12052^2 + 95^2 .

It is an emirp because it is prime and its reverse (927952541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145259729 - 2²⁴ = 128482513 is a prime.

It is a super-2 number, since 2×145259729² = 42200777738306882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145259729.

It is not a weakly prime, because it can be changed into another prime (145259029) 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, 72629864 + 72629865.

It is an arithmetic number, because the mean of its divisors is an integer number (72629865).

Almost surely, 2^145259729 is an apocalyptic number.

It is an amenable number.

145259729 is a deficient number, since it is larger than the sum of its proper divisors (1).

145259729 is an equidigital number, since it uses as much as digits as its factorization.

145259729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 44.

The square root of 145259729 is about 12052.3744133677. The cubic root of 145259729 is about 525.6722804023.

The spelling of 145259729 in words is "one hundred forty-five million, two hundred fifty-nine thousand, seven hundred twenty-nine".