8145621 has 12 divisors (see below), whose sum is σ = 12835680. Its totient is φ = 4936680.

The previous prime is 8145583. The next prime is 8145629. The reversal of 8145621 is 1265418.

It is not a de Polignac number, because 8145621 - 2¹⁷ = 8014549 is a prime.

It is a super-2 number, since 2×8145621² = 132702282951282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8145629) 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 11 ways as a sum of consecutive naturals, for example, 41041 + ... + 41238.

It is an arithmetic number, because the mean of its divisors is an integer number (1069640).

Almost surely, 2^8145621 is an apocalyptic number.

It is an amenable number.

8145621 is a deficient number, since it is larger than the sum of its proper divisors (4690059).

8145621 is a wasteful number, since it uses less digits than its factorization.

8145621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82296 (or 82293 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 8145621 is about 2854.0534332770. The cubic root of 8145621 is about 201.2062188883.

The spelling of 8145621 in words is "eight million, one hundred forty-five thousand, six hundred twenty-one".