1242021300 has 72 divisors (see below), whose sum is σ = 3870023136. Its totient is φ = 305727360.

The previous prime is 1242021299. The next prime is 1242021371. The reversal of 1242021300 is 31202421.

1242021300 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1242021300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 155334 + ... + 163133.

Almost surely, 2^1242021300 is an apocalyptic number.

1242021300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242021300 is an abundant number, since it is smaller than the sum of its proper divisors (2628001836).

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

1242021300 is a wasteful number, since it uses less digits than its factorization.

1242021300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318497 (or 318490 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1242021300 is about 35242.3225681850. The cubic root of 1242021300 is about 1074.9205061102.

Adding to 1242021300 its reverse (31202421), we get a palindrome (1273223721).

The spelling of 1242021300 in words is "one billion, two hundred forty-two million, twenty-one thousand, three hundred".