145745749 has 2 divisors, whose sum is σ = 145745750. Its totient is φ = 145745748.

The previous prime is 145745729. The next prime is 145745771. The reversal of 145745749 is 947547541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114105124 + 31640625 = 10682^2 + 5625^2 .

It is a cyclic number.

It is not a de Polignac number, because 145745749 - 2²⁷ = 11528021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145745699 and 145745708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145745729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72872874 + 72872875.

It is an arithmetic number, because the mean of its divisors is an integer number (72872875).

Almost surely, 2^145745749 is an apocalyptic number.

It is an amenable number.

145745749 is a deficient number, since it is larger than the sum of its proper divisors (1).

145745749 is an equidigital number, since it uses as much as digits as its factorization.

145745749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705600, while the sum is 46.

The square root of 145745749 is about 12072.5204079347. The cubic root of 145745749 is about 526.2579045798.

The spelling of 145745749 in words is "one hundred forty-five million, seven hundred forty-five thousand, seven hundred forty-nine".