1242169519 has 2 divisors, whose sum is σ = 1242169520. Its totient is φ = 1242169518.

The previous prime is 1242169507. The next prime is 1242169573. The reversal of 1242169519 is 9159612421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242169519 - 2⁹ = 1242169007 is a prime.

It is a super-2 number, since 2×1242169519² = 3085970227865382722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242169319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621084759 + 621084760.

It is an arithmetic number, because the mean of its divisors is an integer number (621084760).

Almost surely, 2^1242169519 is an apocalyptic number.

1242169519 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242169519 is an equidigital number, since it uses as much as digits as its factorization.

1242169519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 40.

The square root of 1242169519 is about 35244.4253606155. The cubic root of 1242169519 is about 1074.9632636446.

The spelling of 1242169519 in words is "one billion, two hundred forty-two million, one hundred sixty-nine thousand, five hundred nineteen".