1242549853 has 8 divisors (see below), whose sum is σ = 1264908960. Its totient is φ = 1220234160.

The previous prime is 1242549851. The next prime is 1242549871. The reversal of 1242549853 is 3589452421.

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 1242549853 - 2¹ = 1242549851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242549851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49926 + ... + 70552.

It is an arithmetic number, because the mean of its divisors is an integer number (158113620).

Almost surely, 2^1242549853 is an apocalyptic number.

It is an amenable number.

1242549853 is a deficient number, since it is larger than the sum of its proper divisors (22359107).

1242549853 is a wasteful number, since it uses less digits than its factorization.

1242549853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21707.

The product of its digits is 345600, while the sum is 43.

The square root of 1242549853 is about 35249.8206094726. The cubic root of 1242549853 is about 1075.0729650853.

The spelling of 1242549853 in words is "one billion, two hundred forty-two million, five hundred forty-nine thousand, eight hundred fifty-three".