8149021 has 6 divisors (see below), whose sum is σ = 8293022. Its totient is φ = 8007480.

The previous prime is 8149007. The next prime is 8149027. The reversal of 8149021 is 1209418.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7365796 + 783225 = 2714^2 + 885^2 .

It is not a de Polignac number, because 8149021 - 2¹³ = 8140829 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 (8149027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2311 + ... + 4651.

Almost surely, 2^8149021 is an apocalyptic number.

It is an amenable number.

8149021 is a deficient number, since it is larger than the sum of its proper divisors (144001).

8149021 is an equidigital number, since it uses as much as digits as its factorization.

8149021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459 (or 2400 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 8149021 is about 2854.6490152031. The cubic root of 8149021 is about 201.2342096326.

The spelling of 8149021 in words is "eight million, one hundred forty-nine thousand, twenty-one".