3655951 has 4 divisors (see below), whose sum is σ = 3937192. Its totient is φ = 3374712.

The previous prime is 3655937. The next prime is 3655957. The reversal of 3655951 is 1595563.

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

It is a cyclic number.

It is not a de Polignac number, because 3655951 - 2¹³ = 3647759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3655957) by changing a digit.

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, 140601 + ... + 140626.

It is an arithmetic number, because the mean of its divisors is an integer number (984298).

Almost surely, 2^3655951 is an apocalyptic number.

3655951 is a deficient number, since it is larger than the sum of its proper divisors (281241).

3655951 is a wasteful number, since it uses less digits than its factorization.

3655951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281240.

The product of its digits is 20250, while the sum is 34.

The square root of 3655951 is about 1912.0541310329. The cubic root of 3655951 is about 154.0518041267.

The spelling of 3655951 in words is "three million, six hundred fifty-five thousand, nine hundred fifty-one".