1490883221 has 4 divisors (see below), whose sum is σ = 1578582252. Its totient is φ = 1403184192.

The previous prime is 1490883157. The next prime is 1490883223. The reversal of 1490883221 is 1223880941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1223880941 = 13463 ⋅90907.

It can be written as a sum of positive squares in 2 ways, for example, as 558802321 + 932080900 = 23639^2 + 30530^2 .

It is a cyclic number.

It is not a de Polignac number, because 1490883221 - 2⁶ = 1490883157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1490883223) 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, 43849490 + ... + 43849523.

It is an arithmetic number, because the mean of its divisors is an integer number (394645563).

Almost surely, 2^1490883221 is an apocalyptic number.

It is an amenable number.

1490883221 is a deficient number, since it is larger than the sum of its proper divisors (87699031).

1490883221 is an equidigital number, since it uses as much as digits as its factorization.

1490883221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87699030.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 1490883221 is about 38611.9569693120. The cubic root of 1490883221 is about 1142.3903933335.

The spelling of 1490883221 in words is "one billion, four hundred ninety million, eight hundred eighty-three thousand, two hundred twenty-one".