145856105 has 4 divisors (see below), whose sum is σ = 175027332. Its totient is φ = 116684880.

The previous prime is 145856099. The next prime is 145856111. The reversal of 145856105 is 501658541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501658541 = 409 ⋅1226549.

It is an interprime number because it is at equal distance from previous prime (145856099) and next prime (145856111).

It can be written as a sum of positive squares in 2 ways, for example, as 92083216 + 53772889 = 9596^2 + 7333^2 .

It is not a de Polignac number, because 145856105 - 2¹² = 145852009 is a prime.

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

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 14585606 + ... + 14585615.

It is an arithmetic number, because the mean of its divisors is an integer number (43756833).

Almost surely, 2^145856105 is an apocalyptic number.

It is an amenable number.

145856105 is a deficient number, since it is larger than the sum of its proper divisors (29171227).

145856105 is an equidigital number, since it uses as much as digits as its factorization.

145856105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29171226.

The product of its (nonzero) digits is 24000, while the sum is 35.

The square root of 145856105 is about 12077.0900882622. The cubic root of 145856105 is about 526.3906953379.

The spelling of 145856105 in words is "one hundred forty-five million, eight hundred fifty-six thousand, one hundred five".