145759217 has 2 divisors, whose sum is σ = 145759218. Its totient is φ = 145759216.

The previous prime is 145759213. The next prime is 145759277. The reversal of 145759217 is 712957541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145709041 + 50176 = 12071^2 + 224^2 .

It is a cyclic number.

It is not a de Polignac number, because 145759217 - 2² = 145759213 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145759213) 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, 72879608 + 72879609.

It is an arithmetic number, because the mean of its divisors is an integer number (72879609).

Almost surely, 2^145759217 is an apocalyptic number.

It is an amenable number.

145759217 is a deficient number, since it is larger than the sum of its proper divisors (1).

145759217 is an equidigital number, since it uses as much as digits as its factorization.

145759217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88200, while the sum is 41.

The square root of 145759217 is about 12073.0781907515. The cubic root of 145759217 is about 526.2741141392.

The spelling of 145759217 in words is "one hundred forty-five million, seven hundred fifty-nine thousand, two hundred seventeen".