3665250 has 80 divisors (see below), whose sum is σ = 10306296. Its totient is φ = 972000.

The previous prime is 3665239. The next prime is 3665261. The reversal of 3665250 is 525663.

3665250 is a `hidden beast` number, since 3 + 6 + 652 + 5 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (3665239) and next prime (3665261).

It can be written as a sum of positive squares in 4 ways, for example, as 194481 + 3470769 = 441^2 + 1863^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20160 + ... + 20340.

Almost surely, 2^3665250 is an apocalyptic number.

3665250 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3665250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5153148).

3665250 is an abundant number, since it is smaller than the sum of its proper divisors (6641046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3665250 is a wasteful number, since it uses less digits than its factorization.

3665250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 3665250 is about 1914.4842647564. The cubic root of 3665250 is about 154.1823050446.

The spelling of 3665250 in words is "three million, six hundred sixty-five thousand, two hundred fifty".