252142340 has 24 divisors (see below), whose sum is σ = 535452120. Its totient is φ = 99723008.

The previous prime is 252142339. The next prime is 252142343. The reversal of 252142340 is 43241252.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18113536 + 234028804 = 4256^2 + 15298^2 .

It is not an unprimeable number, because it can be changed into a prime (252142343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69047 + ... + 72606.

It is an arithmetic number, because the mean of its divisors is an integer number (22310505).

Almost surely, 2^252142340 is an apocalyptic number.

252142340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252142340 is an abundant number, since it is smaller than the sum of its proper divisors (283309780).

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

252142340 is a wasteful number, since it uses less digits than its factorization.

252142340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141751 (or 141749 counting only the distinct ones).

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

The square root of 252142340 is about 15878.9905220703. The cubic root of 252142340 is about 631.7548620673.

Adding to 252142340 its reverse (43241252), we get a palindrome (295383592).

The spelling of 252142340 in words is "two hundred fifty-two million, one hundred forty-two thousand, three hundred forty".