1240421200 has 60 divisors (see below), whose sum is σ = 2991370048. Its totient is φ = 494294400.

The previous prime is 1240421131. The next prime is 1240421207. The reversal of 1240421200 is 21240421.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240421207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102679 + ... + 114121.

Almost surely, 2^1240421200 is an apocalyptic number.

1240421200 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 1240421200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1495685024).

1240421200 is an abundant number, since it is smaller than the sum of its proper divisors (1750948848).

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

1240421200 is a wasteful number, since it uses less digits than its factorization.

1240421200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11732 (or 11721 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1240421200 is about 35219.6138536469. The cubic root of 1240421200 is about 1074.4586998997.

Adding to 1240421200 its reverse (21240421), we get a palindrome (1261661621).

The spelling of 1240421200 in words is "one billion, two hundred forty million, four hundred twenty-one thousand, two hundred".