3251621 has 4 divisors (see below), whose sum is σ = 3356544. Its totient is φ = 3146700.

The previous prime is 3251609. The next prime is 3251653. The reversal of 3251621 is 1261523.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3251621 - 2⁶ = 3251557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3251593 and 3251602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3251681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52415 + ... + 52476.

It is an arithmetic number, because the mean of its divisors is an integer number (839136).

Almost surely, 2^3251621 is an apocalyptic number.

3251621 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3251621 is a deficient number, since it is larger than the sum of its proper divisors (104923).

3251621 is a wasteful number, since it uses less digits than its factorization.

3251621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104922.

The product of its digits is 360, while the sum is 20.

The square root of 3251621 is about 1803.2251661953. The cubic root of 3251621 is about 148.1494260252.

The spelling of 3251621 in words is "three million, two hundred fifty-one thousand, six hundred twenty-one".