252657105 has 8 divisors (see below), whose sum is σ = 404251392. Its totient is φ = 134750448.

The previous prime is 252657071. The next prime is 252657109. The reversal of 252657105 is 501756252.

252657105 = 5022² + 5023² + ... + 5031².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 252657105 - 2¹⁶ = 252591569 is a prime.

It is a super-2 number, since 2×252657105² = 127671225413962050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (252657109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8421889 + ... + 8421918.

It is an arithmetic number, because the mean of its divisors is an integer number (50531424).

Almost surely, 2^252657105 is an apocalyptic number.

It is an amenable number.

252657105 is a deficient number, since it is larger than the sum of its proper divisors (151594287).

252657105 is a wasteful number, since it uses less digits than its factorization.

252657105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16843815.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 252657105 is about 15895.1912539611. The cubic root of 252657105 is about 632.1844927183.

The spelling of 252657105 in words is "two hundred fifty-two million, six hundred fifty-seven thousand, one hundred five".