3652261 has 4 divisors (see below), whose sum is σ = 3688524. Its totient is φ = 3616000.

The previous prime is 3652223. The next prime is 3652279. The reversal of 3652261 is 1622563.

3652261 = T₈₀ + T₈₁ + ... + T₂₈₁.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1622563 = 71 ⋅22853.

It can be written as a sum of positive squares in 2 ways, for example, as 3261636 + 390625 = 1806^2 + 625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3652261 is a prime.

It is a Duffinian number.

3652261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3652211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17980 + ... + 18181.

It is an arithmetic number, because the mean of its divisors is an integer number (922131).

Almost surely, 2^3652261 is an apocalyptic number.

It is an amenable number.

3652261 is a deficient number, since it is larger than the sum of its proper divisors (36263).

3652261 is a wasteful number, since it uses less digits than its factorization.

3652261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36262.

The product of its digits is 2160, while the sum is 25.

The square root of 3652261 is about 1911.0889565899. The cubic root of 3652261 is about 153.9999578344. Note that the first 4 decimals are identical.

The spelling of 3652261 in words is "three million, six hundred fifty-two thousand, two hundred sixty-one".