1242630511 has 2 divisors, whose sum is σ = 1242630512. Its totient is φ = 1242630510.

The previous prime is 1242630497. The next prime is 1242630523. The reversal of 1242630511 is 1150362421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1242630511 - 2⁵ = 1242630479 is a prime.

It is a super-2 number, since 2×1242630511² = 3088261173736242242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242630581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621315255 + 621315256.

It is an arithmetic number, because the mean of its divisors is an integer number (621315256).

Almost surely, 2^1242630511 is an apocalyptic number.

1242630511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242630511 is an equidigital number, since it uses as much as digits as its factorization.

1242630511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1242630511 is about 35250.9646818353. The cubic root of 1242630511 is about 1075.0962267566.

Adding to 1242630511 its reverse (1150362421), we get a palindrome (2392992932).

The spelling of 1242630511 in words is "one billion, two hundred forty-two million, six hundred thirty thousand, five hundred eleven".