252717661 has 8 divisors (see below), whose sum is σ = 290020544. Its totient is φ = 215714880.

The previous prime is 252717643. The next prime is 252717679. The reversal of 252717661 is 166717252.

It is an interprime number because it is at equal distance from previous prime (252717643) and next prime (252717679).

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

It is a cyclic number.

It is not a de Polignac number, because 252717661 - 2¹¹ = 252715613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 252717661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252717061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73215 + ... + 76588.

It is an arithmetic number, because the mean of its divisors is an integer number (36252568).

Almost surely, 2^252717661 is an apocalyptic number.

It is an amenable number.

252717661 is a deficient number, since it is larger than the sum of its proper divisors (37302883).

252717661 is a wasteful number, since it uses less digits than its factorization.

252717661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150051.

The product of its digits is 35280, while the sum is 37.

The square root of 252717661 is about 15897.0959926648. The cubic root of 252717661 is about 632.2349952971.

The spelling of 252717661 in words is "two hundred fifty-two million, seven hundred seventeen thousand, six hundred sixty-one".