1242465221 has 8 divisors (see below), whose sum is σ = 1297086720. Its totient is φ = 1187893872.

The previous prime is 1242465209. The next prime is 1242465223. The reversal of 1242465221 is 1225642421.

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 1242465221 - 2³⁰ = 168723397 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 (1242465223) 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, 43475 + ... + 66143.

It is an arithmetic number, because the mean of its divisors is an integer number (162135840).

Almost surely, 2^1242465221 is an apocalyptic number.

It is an amenable number.

1242465221 is a deficient number, since it is larger than the sum of its proper divisors (54621499).

1242465221 is a wasteful number, since it uses less digits than its factorization.

1242465221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25075.

The product of its digits is 7680, while the sum is 29.

The square root of 1242465221 is about 35248.6201290207. The cubic root of 1242465221 is about 1075.0485562347.

The spelling of 1242465221 in words is "one billion, two hundred forty-two million, four hundred sixty-five thousand, two hundred twenty-one".