1061487221 has 2 divisors, whose sum is σ = 1061487222. Its totient is φ = 1061487220.

The previous prime is 1061487211. The next prime is 1061487223. The reversal of 1061487221 is 1227841601.

It is a happy number.

1061487221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 847450321 + 214036900 = 29111^2 + 14630^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061487221 - 2¹⁰ = 1061486197 is a prime.

It is a super-2 number, since 2×1061487221² = 2253510240692605682, which contains 22 as substring.

Together with 1061487223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1061487223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530743610 + 530743611.

It is an arithmetic number, because the mean of its divisors is an integer number (530743611).

Almost surely, 2^1061487221 is an apocalyptic number.

It is an amenable number.

1061487221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061487221 is an equidigital number, since it uses as much as digits as its factorization.

1061487221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 1061487221 is about 32580.4730014774. The cubic root of 1061487221 is about 1020.0894516578.

The spelling of 1061487221 in words is "one billion, sixty-one million, four hundred eighty-seven thousand, two hundred twenty-one".