3638121 has 8 divisors (see below), whose sum is σ = 4899264. Its totient is φ = 2401200.

The previous prime is 3638113. The next prime is 3638147. The reversal of 3638121 is 1218363.

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

It is not a de Polignac number, because 3638121 - 2³ = 3638113 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 3638091 and 3638100.

It is not an unprimeable number, because it can be changed into a prime (3638171) 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, 5701 + ... + 6306.

It is an arithmetic number, because the mean of its divisors is an integer number (612408).

Almost surely, 2^3638121 is an apocalyptic number.

It is an amenable number.

3638121 is a deficient number, since it is larger than the sum of its proper divisors (1261143).

3638121 is a wasteful number, since it uses less digits than its factorization.

3638121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12111.

The product of its digits is 864, while the sum is 24.

The square root of 3638121 is about 1907.3859074660. The cubic root of 3638121 is about 153.8009600393.

The spelling of 3638121 in words is "three million, six hundred thirty-eight thousand, one hundred twenty-one".