242147620 has 144 divisors (see below), whose sum is σ = 619375680. Its totient is φ = 78946560.

The previous prime is 242147617. The next prime is 242147621. The reversal of 242147620 is 26741242.

It is a happy number.

242147620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (242147621) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1352691 + ... + 1352869.

It is an arithmetic number, because the mean of its divisors is an integer number (4301220).

Almost surely, 2^242147620 is an apocalyptic number.

242147620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 242147620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309687840).

242147620 is an abundant number, since it is smaller than the sum of its proper divisors (377228060).

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

242147620 is a wasteful number, since it uses less digits than its factorization.

242147620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 242147620 is about 15561.0931492617. The cubic root of 242147620 is about 623.2946535014.

Adding to 242147620 its reverse (26741242), we get a palindrome (268888862).

The spelling of 242147620 in words is "two hundred forty-two million, one hundred forty-seven thousand, six hundred twenty".