145717757 has 2 divisors, whose sum is σ = 145717758. Its totient is φ = 145717756.

The previous prime is 145717753. The next prime is 145717769. The reversal of 145717757 is 757717541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144817156 + 900601 = 12034^2 + 949^2 .

It is a cyclic number.

It is not a de Polignac number, because 145717757 - 2² = 145717753 is a prime.

It is a super-2 number, since 2×145717757² = 42467329410222098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145717753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72858878 + 72858879.

It is an arithmetic number, because the mean of its divisors is an integer number (72858879).

Almost surely, 2^145717757 is an apocalyptic number.

It is an amenable number.

145717757 is a deficient number, since it is larger than the sum of its proper divisors (1).

145717757 is an equidigital number, since it uses as much as digits as its factorization.

145717757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240100, while the sum is 44.

The square root of 145717757 is about 12071.3610251703. The cubic root of 145717757 is about 526.2242113056.

The spelling of 145717757 in words is "one hundred forty-five million, seven hundred seventeen thousand, seven hundred fifty-seven".