1242302420 has 24 divisors (see below), whose sum is σ = 2617751304. Its totient is φ = 495222656.

The previous prime is 1242302389. The next prime is 1242302461. The reversal of 1242302420 is 242032421.

It can be written as a sum of positive squares in 4 ways, for example, as 200562244 + 1041740176 = 14162^2 + 32276^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1242302392 and 1242302401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100139 + ... + 111858.

It is an arithmetic number, because the mean of its divisors is an integer number (109072971).

Almost surely, 2^1242302420 is an apocalyptic number.

1242302420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242302420 is an abundant number, since it is smaller than the sum of its proper divisors (1375448884).

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

1242302420 is a wasteful number, since it uses less digits than its factorization.

1242302420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212299 (or 212297 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1242302420 is about 35246.3107289259. The cubic root of 1242302420 is about 1075.0015994207.

Adding to 1242302420 its reverse (242032421), we get a palindrome (1484334841).

The spelling of 1242302420 in words is "one billion, two hundred forty-two million, three hundred two thousand, four hundred twenty".