1242350100 has 54 divisors (see below), whose sum is σ = 3894080190. Its totient is φ = 331293120.

The previous prime is 1242350099. The next prime is 1242350167. The reversal of 1242350100 is 10532421.

It can be written as a sum of positive squares in 3 ways, for example, as 5702544 + 1236647556 = 2388^2 + 35166^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 689295 + ... + 691094.

Almost surely, 2^1242350100 is an apocalyptic number.

1242350100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242350100 is an abundant number, since it is smaller than the sum of its proper divisors (2651730090).

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

1242350100 is a wasteful number, since it uses less digits than its factorization.

1242350100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380409 (or 1380399 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1242350100 is about 35246.9871052832. The cubic root of 1242350100 is about 1075.0153522235.

Adding to 1242350100 its reverse (10532421), we get a palindrome (1252882521).

The spelling of 1242350100 in words is "one billion, two hundred forty-two million, three hundred fifty thousand, one hundred".