8121490 has 16 divisors (see below), whose sum is σ = 15743448. Its totient is φ = 2998656.

The previous prime is 8121439. The next prime is 8121499. The reversal of 8121490 is 941218.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5166529 + 2954961 = 2273^2 + 1719^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (8121499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31107 + ... + 31366.

Almost surely, 2^8121490 is an apocalyptic number.

8121490 is a deficient number, since it is larger than the sum of its proper divisors (7621958).

8121490 is a wasteful number, since it uses less digits than its factorization.

8121490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62493.

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

The square root of 8121490 is about 2849.8228015089. The cubic root of 8121490 is about 201.0073345343.

The spelling of 8121490 in words is "eight million, one hundred twenty-one thousand, four hundred ninety".