1242420564 has 96 divisors (see below), whose sum is σ = 3804595200. Its totient is φ = 305717760.

The previous prime is 1242420547. The next prime is 1242420577. The reversal of 1242420564 is 4650242421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17829 + ... + 52940.

It is an arithmetic number, because the mean of its divisors is an integer number (39631200).

Almost surely, 2^1242420564 is an apocalyptic number.

1242420564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1242420564 is an abundant number, since it is smaller than the sum of its proper divisors (2562174636).

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

1242420564 is a wasteful number, since it uses less digits than its factorization.

1242420564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70813 (or 70811 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 1242420564 is about 35247.9866659076. The cubic root of 1242420564 is about 1075.0356761912.

Adding to 1242420564 its reverse (4650242421), we get a palindrome (5892662985).

The spelling of 1242420564 in words is "one billion, two hundred forty-two million, four hundred twenty thousand, five hundred sixty-four".