145720345 has 16 divisors (see below), whose sum is σ = 185597568. Its totient is φ = 109454080.

The previous prime is 145720321. The next prime is 145720349. The reversal of 145720345 is 543027541.

It is not a de Polignac number, because 145720345 - 2⁷ = 145720217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145720349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37860 + ... + 41530.

It is an arithmetic number, because the mean of its divisors is an integer number (11599848).

Almost surely, 2^145720345 is an apocalyptic number.

It is an amenable number.

145720345 is a deficient number, since it is larger than the sum of its proper divisors (39877223).

145720345 is a wasteful number, since it uses less digits than its factorization.

145720345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4160.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 145720345 is about 12071.4682205604. The cubic root of 145720345 is about 526.2273265978.

Adding to 145720345 its reverse (543027541), we get a palindrome (688747886).

The spelling of 145720345 in words is "one hundred forty-five million, seven hundred twenty thousand, three hundred forty-five".