3621551 has 8 divisors (see below), whose sum is σ = 3707904. Its totient is φ = 3536280.

The previous prime is 3621529. The next prime is 3621559. The reversal of 3621551 is 1551263.

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-3621551 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 (3621559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12656 + ... + 12938.

It is an arithmetic number, because the mean of its divisors is an integer number (463488).

Almost surely, 2^3621551 is an apocalyptic number.

3621551 is a deficient number, since it is larger than the sum of its proper divisors (86353).

3621551 is a wasteful number, since it uses less digits than its factorization.

3621551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541.

The product of its digits is 900, while the sum is 23.

The square root of 3621551 is about 1903.0373091456. The cubic root of 3621551 is about 153.5671066491.

The spelling of 3621551 in words is "three million, six hundred twenty-one thousand, five hundred fifty-one".