145416685 has 4 divisors (see below), whose sum is σ = 174500028. Its totient is φ = 116333344.

The previous prime is 145416659. The next prime is 145416727. The reversal of 145416685 is 586614541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71267364 + 74149321 = 8442^2 + 8611^2 .

It is a cyclic number.

It is not a de Polignac number, because 145416685 - 2⁵ = 145416653 is a prime.

It is a super-2 number, since 2×145416685² = 42292024552778450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14541664 + ... + 14541673.

It is an arithmetic number, because the mean of its divisors is an integer number (43625007).

Almost surely, 2^145416685 is an apocalyptic number.

It is an amenable number.

145416685 is a deficient number, since it is larger than the sum of its proper divisors (29083343).

145416685 is an equidigital number, since it uses as much as digits as its factorization.

145416685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29083342.

The product of its digits is 115200, while the sum is 40.

The square root of 145416685 is about 12058.8840694320. The cubic root of 145416685 is about 525.8615453369.

The spelling of 145416685 in words is "one hundred forty-five million, four hundred sixteen thousand, six hundred eighty-five".