145747505 has 8 divisors (see below), whose sum is σ = 174963624. Its totient is φ = 116553600.

The previous prime is 145747501. The next prime is 145747507. The reversal of 145747505 is 505747541.

It can be written as a sum of positive squares in 4 ways, for example, as 68939809 + 76807696 = 8303^2 + 8764^2 .

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

It is not a de Polignac number, because 145747505 - 2² = 145747501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145747501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17885 + ... + 24725.

It is an arithmetic number, because the mean of its divisors is an integer number (21870453).

Almost surely, 2^145747505 is an apocalyptic number.

It is an amenable number.

145747505 is a deficient number, since it is larger than the sum of its proper divisors (29216119).

145747505 is an equidigital number, since it uses as much as digits as its factorization.

145747505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11107.

The product of its (nonzero) digits is 98000, while the sum is 38.

The square root of 145747505 is about 12072.5931348654. The cubic root of 145747505 is about 526.2600180895.

The spelling of 145747505 in words is "one hundred forty-five million, seven hundred forty-seven thousand, five hundred five".