3421651 has 4 divisors (see below), whose sum is σ = 3428352. Its totient is φ = 3414952.

The previous prime is 3421637. The next prime is 3421657. The reversal of 3421651 is 1561243.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3421651 - 2¹⁷ = 3290579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3421657) 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, 2515 + ... + 3628.

It is an arithmetic number, because the mean of its divisors is an integer number (857088).

Almost surely, 2^3421651 is an apocalyptic number.

3421651 is a deficient number, since it is larger than the sum of its proper divisors (6701).

3421651 is an equidigital number, since it uses as much as digits as its factorization.

3421651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6700.

The product of its digits is 720, while the sum is 22.

The square root of 3421651 is about 1849.7705263086. The cubic root of 3421651 is about 150.6879657892.

Adding to 3421651 its reverse (1561243), we get a palindrome (4982894).

The spelling of 3421651 in words is "three million, four hundred twenty-one thousand, six hundred fifty-one".