1242411869 has 2 divisors, whose sum is σ = 1242411870. Its totient is φ = 1242411868.

The previous prime is 1242411851. The next prime is 1242411883. The reversal of 1242411869 is 9681142421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 657255769 + 585156100 = 25637^2 + 24190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242411869 is a prime.

It is a super-2 number, since 2×1242411869² = 3087174504464146322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242419869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621205934 + 621205935.

It is an arithmetic number, because the mean of its divisors is an integer number (621205935).

Almost surely, 2^1242411869 is an apocalyptic number.

It is an amenable number.

1242411869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242411869 is an equidigital number, since it uses as much as digits as its factorization.

1242411869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 38.

The square root of 1242411869 is about 35247.8633253138. The cubic root of 1242411869 is about 1075.0331683294.

The spelling of 1242411869 in words is "one billion, two hundred forty-two million, four hundred eleven thousand, eight hundred sixty-nine".