145403705 has 8 divisors (see below), whose sum is σ = 175004232. Its totient is φ = 115976448.

The previous prime is 145403647. The next prime is 145403707. The reversal of 145403705 is 507304541.

It can be written as a sum of positive squares in 4 ways, for example, as 3031081 + 142372624 = 1741^2 + 11932^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 145403705 - 2⁸ = 145403449 is a prime.

It is a super-2 number, since 2×145403705² = 42284474855454050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145403707) 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, 41462 + ... + 44831.

It is an arithmetic number, because the mean of its divisors is an integer number (21875529).

Almost surely, 2^145403705 is an apocalyptic number.

It is an amenable number.

145403705 is a deficient number, since it is larger than the sum of its proper divisors (29600527).

145403705 is an equidigital number, since it uses as much as digits as its factorization.

145403705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86635.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 145403705 is about 12058.3458650016. The cubic root of 145403705 is about 525.8458986089.

The spelling of 145403705 in words is "one hundred forty-five million, four hundred three thousand, seven hundred five".