3581421 has 8 divisors (see below), whose sum is σ = 4785600. Its totient is φ = 2382432.

The previous prime is 3581419. The next prime is 3581429. The reversal of 3581421 is 1241853.

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

It is not a de Polignac number, because 3581421 - 2¹ = 3581419 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3581391 and 3581400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3581429) 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, 801 + ... + 2793.

It is an arithmetic number, because the mean of its divisors is an integer number (598200).

Almost surely, 2^3581421 is an apocalyptic number.

It is an amenable number.

3581421 is a deficient number, since it is larger than the sum of its proper divisors (1204179).

3581421 is a wasteful number, since it uses less digits than its factorization.

3581421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595.

The product of its digits is 960, while the sum is 24.

The square root of 3581421 is about 1892.4642665054. The cubic root of 3581421 is about 152.9977785999.

The spelling of 3581421 in words is "three million, five hundred eighty-one thousand, four hundred twenty-one".