1260922021 has 2 divisors, whose sum is σ = 1260922022. Its totient is φ = 1260922020.

The previous prime is 1260921989. The next prime is 1260922073. The reversal of 1260922021 is 1202290621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1139062500 + 121859521 = 33750^2 + 11039^2 .

It is a cyclic number.

It is not a de Polignac number, because 1260922021 - 2⁵ = 1260921989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1260922321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630461010 + 630461011.

It is an arithmetic number, because the mean of its divisors is an integer number (630461011).

Almost surely, 2^1260922021 is an apocalyptic number.

It is an amenable number.

1260922021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260922021 is an equidigital number, since it uses as much as digits as its factorization.

1260922021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1260922021 is about 35509.4638230430. The cubic root of 1260922021 is about 1080.3456886650.

The spelling of 1260922021 in words is "one billion, two hundred sixty million, nine hundred twenty-two thousand, twenty-one".