1242131200 has 54 divisors (see below), whose sum is σ = 3074484644. Its totient is φ = 496849920.

The previous prime is 1242131183. The next prime is 1242131207. The reversal of 1242131200 is 21312421.

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

It is not an unprimeable number, because it can be changed into a prime (1242131207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90642 + ... + 103441.

Almost surely, 2^1242131200 is an apocalyptic number.

1242131200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242131200 is an abundant number, since it is smaller than the sum of its proper divisors (1832353444).

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

1242131200 is an equidigital number, since it uses as much as digits as its factorization.

1242131200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194109 (or 194090 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1242131200 is about 35243.8817385373. The cubic root of 1242131200 is about 1074.9522098820.

Adding to 1242131200 its reverse (21312421), we get a palindrome (1263443621).

The spelling of 1242131200 in words is "one billion, two hundred forty-two million, one hundred thirty-one thousand, two hundred".