1242004020 has 48 divisors (see below), whose sum is σ = 3682179648. Its totient is φ = 311718400.

The previous prime is 1242004019. The next prime is 1242004031. The reversal of 1242004020 is 204002421.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 607806 + ... + 609845.

It is an arithmetic number, because the mean of its divisors is an integer number (76712076).

Almost surely, 2^1242004020 is an apocalyptic number.

1242004020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242004020 is an abundant number, since it is smaller than the sum of its proper divisors (2440175628).

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

1242004020 is a wasteful number, since it uses less digits than its factorization.

1242004020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217680 (or 1217678 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1242004020 is about 35242.0774075536. The cubic root of 1242004020 is about 1074.9155210340.

Adding to 1242004020 its reverse (204002421), we get a palindrome (1446006441).

The spelling of 1242004020 in words is "one billion, two hundred forty-two million, four thousand, twenty".