1242644547 has 8 divisors (see below), whose sum is σ = 1657052944. Its totient is φ = 828332928.

The previous prime is 1242644537. The next prime is 1242644549. The reversal of 1242644547 is 7454462421.

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

It is not a de Polignac number, because 1242644547 - 2⁷ = 1242644419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242644549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14703 + ... + 51975.

It is an arithmetic number, because the mean of its divisors is an integer number (207131618).

Almost surely, 2^1242644547 is an apocalyptic number.

1242644547 is a deficient number, since it is larger than the sum of its proper divisors (414408397).

1242644547 is a wasteful number, since it uses less digits than its factorization.

1242644547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48389.

The product of its digits is 215040, while the sum is 39.

The square root of 1242644547 is about 35251.1637680233. The cubic root of 1242644547 is about 1075.1002746195.

The spelling of 1242644547 in words is "one billion, two hundred forty-two million, six hundred forty-four thousand, five hundred forty-seven".