242005725 has 120 divisors (see below), whose sum is σ = 500983560. Its totient is φ = 114670080.

The previous prime is 242005723. The next prime is 242005823. The reversal of 242005725 is 527500242.

It can be written as a sum of positive squares in 12 ways, for example, as 169364196 + 72641529 = 13014^2 + 8523^2 .

It is not a de Polignac number, because 242005725 - 2¹ = 242005723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242005723) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 763267 + ... + 763583.

It is an arithmetic number, because the mean of its divisors is an integer number (4174863).

Almost surely, 2^242005725 is an apocalyptic number.

242005725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

242005725 is an abundant number, since it is smaller than the sum of its proper divisors (258977835).

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

242005725 is a wasteful number, since it uses less digits than its factorization.

242005725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 242005725 is about 15556.5331934850. The cubic root of 242005725 is about 623.1728824983.

Adding to 242005725 its reverse (527500242), we get a palindrome (769505967).

The spelling of 242005725 in words is "two hundred forty-two million, five thousand, seven hundred twenty-five".