252140004 has 18 divisors (see below), whose sum is σ = 637353990. Its totient is φ = 84046656.

The previous prime is 252139997. The next prime is 252140011. The reversal of 252140004 is 400041252.

It is an interprime number because it is at equal distance from previous prime (252139997) and next prime (252140011).

It can be written as a sum of positive squares in only one way, i.e., 191767104 + 60372900 = 13848^2 + 7770^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3501909 + ... + 3501980.

It is an arithmetic number, because the mean of its divisors is an integer number (35408555).

Almost surely, 2^252140004 is an apocalyptic number.

It is an amenable number.

252140004 is an abundant number, since it is smaller than the sum of its proper divisors (385213986).

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

252140004 is a wasteful number, since it uses less digits than its factorization.

252140004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7003899 (or 7003894 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 252140004 is about 15878.9169655868. The cubic root of 252140004 is about 631.7529110742.

Adding to 252140004 its reverse (400041252), we get a palindrome (652181256).

The spelling of 252140004 in words is "two hundred fifty-two million, one hundred forty thousand, four".