1242053687 has 8 divisors (see below), whose sum is σ = 1419814176. Its totient is φ = 1064374272.

The previous prime is 1242053641. The next prime is 1242053699. The reversal of 1242053687 is 7863502421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1242053687 - 2²⁰ = 1241005111 is a prime.

It is a super-2 number, since 2×1242053687² = 3085394722780587938, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242053687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242053387) 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 in 7 ways as a sum of consecutive naturals, for example, 17183 + ... + 52719.

It is an arithmetic number, because the mean of its divisors is an integer number (177476772).

Almost surely, 2^1242053687 is an apocalyptic number.

1242053687 is a deficient number, since it is larger than the sum of its proper divisors (177760489).

1242053687 is an equidigital number, since it uses as much as digits as its factorization.

1242053687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40537.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 1242053687 is about 35242.7820553372. The cubic root of 1242053687 is about 1074.9298492532.

The spelling of 1242053687 in words is "one billion, two hundred forty-two million, fifty-three thousand, six hundred eighty-seven".