3642657 has 4 divisors (see below), whose sum is σ = 4856880. Its totient is φ = 2428436.

The previous prime is 3642649. The next prime is 3642673. The reversal of 3642657 is 7562463.

3642657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7562463 = 3 ⋅2520821.

It is a cyclic number.

It is not a de Polignac number, because 3642657 - 2³ = 3642649 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 3⁸ + 6⁴ + 4 + 2¹¹ + 6⁸ + 5⁹ + 7 .

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3642677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607107 + ... + 607112.

It is an arithmetic number, because the mean of its divisors is an integer number (1214220).

Almost surely, 2^3642657 is an apocalyptic number.

It is an amenable number.

3642657 is a deficient number, since it is larger than the sum of its proper divisors (1214223).

3642657 is a wasteful number, since it uses less digits than its factorization.

3642657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214222.

The product of its digits is 30240, while the sum is 33.

The square root of 3642657 is about 1908.5745990136. The cubic root of 3642657 is about 153.8648530412.

The spelling of 3642657 in words is "three million, six hundred forty-two thousand, six hundred fifty-seven".