1242210061 has 2 divisors, whose sum is σ = 1242210062. Its totient is φ = 1242210060.

The previous prime is 1242210023. The next prime is 1242210089. The reversal of 1242210061 is 1600122421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1242210025 + 36 = 35245^2 + 6^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242210061 - 2⁷ = 1242209933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242210001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621105030 + 621105031.

It is an arithmetic number, because the mean of its divisors is an integer number (621105031).

Almost surely, 2^1242210061 is an apocalyptic number.

It is an amenable number.

1242210061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242210061 is an equidigital number, since it uses as much as digits as its factorization.

1242210061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1242210061 is about 35245.0005107107. Note that the first 3 decimals coincide. The cubic root of 1242210061 is about 1074.9749584215.

Adding to 1242210061 its reverse (1600122421), we get a palindrome (2842332482).

The spelling of 1242210061 in words is "one billion, two hundred forty-two million, two hundred ten thousand, sixty-one".