1242321210 has 96 divisors (see below), whose sum is σ = 3513274128. Its totient is φ = 302745600.

The previous prime is 1242321191. The next prime is 1242321217. The reversal of 1242321210 is 121232421.

It is a happy number.

1242321210 is a `hidden beast` number, since 12 + 423 + 21 + 210 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 212488929 + 1029832281 = 14577^2 + 32091^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1242321217) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 112914 + ... + 123426.

Almost surely, 2^1242321210 is an apocalyptic number.

1242321210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242321210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1756637064).

1242321210 is an abundant number, since it is smaller than the sum of its proper divisors (2270952918).

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

1242321210 is a wasteful number, since it uses less digits than its factorization.

1242321210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10640 (or 10637 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1242321210 is about 35246.5772806382. The cubic root of 1242321210 is about 1075.0070192439.

Adding to 1242321210 its reverse (121232421), we get a palindrome (1363553631).

It can be divided in two parts, 12423 and 21210, that added together give a palindrome (33633).

The spelling of 1242321210 in words is "one billion, two hundred forty-two million, three hundred twenty-one thousand, two hundred ten".