4151621 has 8 divisors (see below), whose sum is σ = 4440384. Its totient is φ = 3867840.

The previous prime is 4151549. The next prime is 4151629. The reversal of 4151621 is 1261514.

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

It is not a de Polignac number, because 4151621 - 2¹⁴ = 4135237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4151593 and 4151602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4151629) 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, 566 + ... + 2936.

It is an arithmetic number, because the mean of its divisors is an integer number (555048).

Almost surely, 2^4151621 is an apocalyptic number.

It is an amenable number.

4151621 is a deficient number, since it is larger than the sum of its proper divisors (288763).

4151621 is a wasteful number, since it uses less digits than its factorization.

4151621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491.

The product of its digits is 240, while the sum is 20.

The square root of 4151621 is about 2037.5526987050. The cubic root of 4151621 is about 160.7209780823.

The spelling of 4151621 in words is "four million, one hundred fifty-one thousand, six hundred twenty-one".