1212644542 has 8 divisors (see below), whose sum is σ = 1819318032. Its totient is φ = 606205200.

The previous prime is 1212644519. The next prime is 1212644567. The reversal of 1212644542 is 2454462121.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 44959 + ... + 66682.

It is an arithmetic number, because the mean of its divisors is an integer number (227414754).

Almost surely, 2^1212644542 is an apocalyptic number.

1212644542 is a deficient number, since it is larger than the sum of its proper divisors (606673490).

1212644542 is a wasteful number, since it uses less digits than its factorization.

1212644542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117074.

The product of its digits is 15360, while the sum is 31.

The square root of 1212644542 is about 34823.0461332721. The cubic root of 1212644542 is about 1066.3779886557.

The spelling of 1212644542 in words is "one billion, two hundred twelve million, six hundred forty-four thousand, five hundred forty-two".