3642861 has 8 divisors (see below), whose sum is σ = 4885920. Its totient is φ = 2414192.

The previous prime is 3642839. The next prime is 3642883. The reversal of 3642861 is 1682463.

It is an interprime number because it is at equal distance from previous prime (3642839) and next prime (3642883).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3642861 - 2⁷ = 3642733 is a prime.

It is a Curzon number.

3642861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3642061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2991 + ... + 4028.

It is an arithmetic number, because the mean of its divisors is an integer number (610740).

Almost surely, 2^3642861 is an apocalyptic number.

It is an amenable number.

3642861 is a deficient number, since it is larger than the sum of its proper divisors (1243059).

3642861 is a wasteful number, since it uses less digits than its factorization.

3642861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7195.

The product of its digits is 6912, while the sum is 30.

The square root of 3642861 is about 1908.6280412904. The cubic root of 3642861 is about 153.8677252893.

The spelling of 3642861 in words is "three million, six hundred forty-two thousand, eight hundred sixty-one".