3807145 has 4 divisors (see below), whose sum is σ = 4568580. Its totient is φ = 3045712.

The previous prime is 3807119. The next prime is 3807173. The reversal of 3807145 is 5417083.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5417083 = 7 ⋅773869.

It can be written as a sum of positive squares in 2 ways, for example, as 1838736 + 1968409 = 1356^2 + 1403^2 .

It is a cyclic number.

It is not a de Polignac number, because 3807145 - 2⁵ = 3807113 is a prime.

It is a super-3 number, since 3×3807145³ (a number of 21 digits) contains 333 as substring.

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, 380710 + ... + 380719.

It is an arithmetic number, because the mean of its divisors is an integer number (1142145).

Almost surely, 2^3807145 is an apocalyptic number.

It is an amenable number.

3807145 is a deficient number, since it is larger than the sum of its proper divisors (761435).

3807145 is an equidigital number, since it uses as much as digits as its factorization.

3807145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761434.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 3807145 is about 1951.1906621343. The cubic root of 3807145 is about 156.1468182776.

The spelling of 3807145 in words is "three million, eight hundred seven thousand, one hundred forty-five".