1242551673 has 24 divisors (see below), whose sum is σ = 1964304576. Its totient is φ = 750621600.

The previous prime is 1242551671. The next prime is 1242551707. The reversal of 1242551673 is 3761552421.

1242551673 is a `hidden beast` number, since 1 + 2 + 42 + 551 + 67 + 3 = 666.

It is not a de Polignac number, because 1242551673 - 2¹ = 1242551671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242551671) 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 23 ways as a sum of consecutive naturals, for example, 10611 + ... + 50967.

It is an arithmetic number, because the mean of its divisors is an integer number (81846024).

Almost surely, 2^1242551673 is an apocalyptic number.

It is an amenable number.

1242551673 is a deficient number, since it is larger than the sum of its proper divisors (721752903).

1242551673 is a wasteful number, since it uses less digits than its factorization.

1242551673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40685 (or 40682 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 1242551673 is about 35249.8464251974. The cubic root of 1242551673 is about 1075.0734899822.

The spelling of 1242551673 in words is "one billion, two hundred forty-two million, five hundred fifty-one thousand, six hundred seventy-three".