1221849948 has 96 divisors (see below), whose sum is σ = 3291805440. Its totient is φ = 348848640.

The previous prime is 1221849931. The next prime is 1221849971. The reversal of 1221849948 is 8499481221.

It is a junction number, because it is equal to n+sod(n) for n = 1221849897 and 1221849906.

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 31 ways as a sum of consecutive naturals, for example, 492840 + ... + 495312.

It is an arithmetic number, because the mean of its divisors is an integer number (34289640).

Almost surely, 2^1221849948 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221849948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1645902720).

1221849948 is an abundant number, since it is smaller than the sum of its proper divisors (2069955492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221849948 is a wasteful number, since it uses less digits than its factorization.

1221849948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707 (or 2705 counting only the distinct ones).

The product of its digits is 331776, while the sum is 48.

The square root of 1221849948 is about 34954.9702903607. The cubic root of 1221849948 is about 1069.0695460347.

The spelling of 1221849948 in words is "one billion, two hundred twenty-one million, eight hundred forty-nine thousand, nine hundred forty-eight".