145747449 has 6 divisors (see below), whose sum is σ = 210524106. Its totient is φ = 97164960.

The previous prime is 145747439. The next prime is 145747453. The reversal of 145747449 is 944747541.

145747449 is a `hidden beast` number, since 1 + 4 + 574 + 74 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 73616400 + 72131049 = 8580^2 + 8493^2 .

It is not a de Polignac number, because 145747449 - 2¹¹ = 145745401 is a prime.

It is a super-4 number, since 4×145747449⁴ (a number of 34 digits) contains 4444 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145747429) 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 in 5 ways as a sum of consecutive naturals, for example, 8097072 + ... + 8097089.

It is an arithmetic number, because the mean of its divisors is an integer number (35087351).

Almost surely, 2^145747449 is an apocalyptic number.

It is an amenable number.

145747449 is a deficient number, since it is larger than the sum of its proper divisors (64776657).

145747449 is a wasteful number, since it uses less digits than its factorization.

145747449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16194167 (or 16194164 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 145747449 is about 12072.5908155623. The cubic root of 145747449 is about 526.2599506885.

The spelling of 145747449 in words is "one hundred forty-five million, seven hundred forty-seven thousand, four hundred forty-nine".