3658421 has 8 divisors (see below), whose sum is σ = 3956064. Its totient is φ = 3363120.

The previous prime is 3658409. The next prime is 3658423. The reversal of 3658421 is 1248563.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3658421 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 (3658423) 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, 4106 + ... + 4916.

It is an arithmetic number, because the mean of its divisors is an integer number (494508).

Almost surely, 2^3658421 is an apocalyptic number.

It is an amenable number.

3658421 is a deficient number, since it is larger than the sum of its proper divisors (297643).

3658421 is a wasteful number, since it uses less digits than its factorization.

3658421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171.

The product of its digits is 5760, while the sum is 29.

The square root of 3658421 is about 1912.6999241909. The cubic root of 3658421 is about 154.0864893378.

The spelling of 3658421 in words is "three million, six hundred fifty-eight thousand, four hundred twenty-one".