3653121 has 8 divisors (see below), whose sum is σ = 5002624. Its totient is φ = 2369520.

The previous prime is 3653081. The next prime is 3653129. The reversal of 3653121 is 1213563.

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

It is not a de Polignac number, because 3653121 - 2⁶ = 3653057 is a prime.

It is a Duffinian number.

3653121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3653129) 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, 16345 + ... + 16566.

It is an arithmetic number, because the mean of its divisors is an integer number (625328).

Almost surely, 2^3653121 is an apocalyptic number.

It is an amenable number.

3653121 is a deficient number, since it is larger than the sum of its proper divisors (1349503).

3653121 is a wasteful number, since it uses less digits than its factorization.

3653121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32951.

The product of its digits is 540, while the sum is 21.

The square root of 3653121 is about 1911.3139459545. The cubic root of 3653121 is about 154.0120443720.

Adding to 3653121 its reverse (1213563), we get a palindrome (4866684).

It can be divided in two parts, 365 and 3121, that added together give a triangular number (3486 = T₈₃).

The spelling of 3653121 in words is "three million, six hundred fifty-three thousand, one hundred twenty-one".