1021954061 has 2 divisors, whose sum is σ = 1021954062. Its totient is φ = 1021954060.

The previous prime is 1021954027. The next prime is 1021954067. The reversal of 1021954061 is 1604591201.

1021954061 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., 981631561 + 40322500 = 31331^2 + 6350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021954061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021954067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510977030 + 510977031.

It is an arithmetic number, because the mean of its divisors is an integer number (510977031).

Almost surely, 2^1021954061 is an apocalyptic number.

It is an amenable number.

1021954061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021954061 is an equidigital number, since it uses as much as digits as its factorization.

1021954061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1021954061 is about 31968.0162193402. The cubic root of 1021954061 is about 1007.2651106782.

The spelling of 1021954061 in words is "one billion, twenty-one million, nine hundred fifty-four thousand, sixty-one".