1246221872 has 80 divisors (see below), whose sum is σ = 2921360640. Its totient is φ = 503629056.

The previous prime is 1246221871. The next prime is 1246221923. The reversal of 1246221872 is 2781226421.

It is not an unprimeable number, because it can be changed into a prime (1246221871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135203 + ... + 144125.

It is an arithmetic number, because the mean of its divisors is an integer number (36517008).

Almost surely, 2^1246221872 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 1246221872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1460680320).

1246221872 is an abundant number, since it is smaller than the sum of its proper divisors (1675138768).

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

1246221872 is a wasteful number, since it uses less digits than its factorization.

1246221872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9010 (or 9004 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 1246221872 is about 35301.8678259380. The cubic root of 1246221872 is about 1076.1309524014.

The spelling of 1246221872 in words is "one billion, two hundred forty-six million, two hundred twenty-one thousand, eight hundred seventy-two".