145616945 has 8 divisors (see below), whose sum is σ = 174911400. Its totient is φ = 116379520.

The previous prime is 145616923. The next prime is 145616981. The reversal of 145616945 is 549616541.

It can be written as a sum of positive squares in 4 ways, for example, as 37540129 + 108076816 = 6127^2 + 10396^2 .

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

It is not a de Polignac number, because 145616945 - 2⁶ = 145616881 is a prime.

It is a super-2 number, since 2×145616945² = 42408589342266050, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8420 + ... + 19029.

It is an arithmetic number, because the mean of its divisors is an integer number (21863925).

Almost surely, 2^145616945 is an apocalyptic number.

It is an amenable number.

145616945 is a deficient number, since it is larger than the sum of its proper divisors (29294455).

145616945 is a wasteful number, since it uses less digits than its factorization.

145616945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28515.

The product of its digits is 129600, while the sum is 41.

The square root of 145616945 is about 12067.1846343710. The cubic root of 145616945 is about 526.1028306430.

The spelling of 145616945 in words is "one hundred forty-five million, six hundred sixteen thousand, nine hundred forty-five".