1246721120 has 96 divisors (see below), whose sum is σ = 3040571520. Its totient is φ = 482826240.

The previous prime is 1246721117. The next prime is 1246721123. The reversal of 1246721120 is 211276421.

It is an interprime number because it is at equal distance from previous prime (1246721117) and next prime (1246721123).

It is a self number, because there is not a number n which added to its sum of digits gives 1246721120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1246721123) 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, 668990 + ... + 670850.

It is an arithmetic number, because the mean of its divisors is an integer number (31672620).

Almost surely, 2^1246721120 is an apocalyptic number.

1246721120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1246721120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1520285760).

1246721120 is an abundant number, since it is smaller than the sum of its proper divisors (1793850400).

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

1246721120 is a wasteful number, since it uses less digits than its factorization.

1246721120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008 (or 2000 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1246721120 is about 35308.9382451526. The cubic root of 1246721120 is about 1076.2746358846.

Adding to 1246721120 its reverse (211276421), we get a palindrome (1457997541).

The spelling of 1246721120 in words is "one billion, two hundred forty-six million, seven hundred twenty-one thousand, one hundred twenty".