242521340 has 48 divisors (see below), whose sum is σ = 518616000. Its totient is φ = 95250432.

The previous prime is 242521319. The next prime is 242521369. The reversal of 242521340 is 43125242.

242521340 = 61² + 62² + ... + 899².

It is a happy number.

242521340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 288641 + ... + 289479.

It is an arithmetic number, because the mean of its divisors is an integer number (10804500).

Almost surely, 2^242521340 is an apocalyptic number.

242521340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242521340 is an abundant number, since it is smaller than the sum of its proper divisors (276094660).

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

242521340 is a wasteful number, since it uses less digits than its factorization.

242521340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094 (or 1092 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 242521340 is about 15573.0966734301. The cubic root of 242521340 is about 623.6151438773.

Adding to 242521340 its reverse (43125242), we get a palindrome (285646582).

The spelling of 242521340 in words is "two hundred forty-two million, five hundred twenty-one thousand, three hundred forty".