145247345 has 8 divisors (see below), whose sum is σ = 174385320. Its totient is φ = 116138880.

The previous prime is 145247339. The next prime is 145247359. The reversal of 145247345 is 543742541.

It can be written as a sum of positive squares in 4 ways, for example, as 1151329 + 144096016 = 1073^2 + 12004^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145247345 - 2⁴ = 145247329 is a prime.

It is a super-3 number, since 3×145247345³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5501 + ... + 17909.

It is an arithmetic number, because the mean of its divisors is an integer number (21798165).

Almost surely, 2^145247345 is an apocalyptic number.

It is an amenable number.

145247345 is a deficient number, since it is larger than the sum of its proper divisors (29137975).

145247345 is a wasteful number, since it uses less digits than its factorization.

145247345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14755.

The product of its digits is 67200, while the sum is 35.

The square root of 145247345 is about 12051.8606447303. The cubic root of 145247345 is about 525.6573413903.

Adding to 145247345 its reverse (543742541), we get a palindrome (688989886).

The spelling of 145247345 in words is "one hundred forty-five million, two hundred forty-seven thousand, three hundred forty-five".