252042645 has 16 divisors (see below), whose sum is σ = 405384192. Its totient is φ = 133717440.

The previous prime is 252042641. The next prime is 252042653. The reversal of 252042645 is 546240252.

It is a happy number.

It is not a de Polignac number, because 252042645 - 2² = 252042641 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252042641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41122 + ... + 46851.

It is an arithmetic number, because the mean of its divisors is an integer number (25336512).

Almost surely, 2^252042645 is an apocalyptic number.

It is an amenable number.

252042645 is a deficient number, since it is larger than the sum of its proper divisors (153341547).

252042645 is a wasteful number, since it uses less digits than its factorization.

252042645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88172.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 252042645 is about 15875.8510008125. The cubic root of 252042645 is about 631.6715875384.

Adding to 252042645 its reverse (546240252), we get a palindrome (798282897).

The spelling of 252042645 in words is "two hundred fifty-two million, forty-two thousand, six hundred forty-five".