252147 has 8 divisors (see below), whose sum is σ = 384256. Its totient is φ = 144072.

The previous prime is 252143. The next prime is 252151. The reversal of 252147 is 741252.

It is an interprime number because it is at equal distance from previous prime (252143) and next prime (252151).

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

It is not a de Polignac number, because 252147 - 2² = 252143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 12007 = 252147 / (2 + 5 + 2 + 1 + 4 + 7).

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

252147 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252143) 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, 5983 + ... + 6024.

It is an arithmetic number, because the mean of its divisors is an integer number (48032).

252147 is a Friedman number, since it can be written as 21*(7^4*5+2), using all its digits and the basic arithmetic operations.

2²⁵²¹⁴⁷ is an apocalyptic number.

252147 is a deficient number, since it is larger than the sum of its proper divisors (132109).

252147 is a wasteful number, since it uses less digits than its factorization.

252147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12017.

The product of its digits is 560, while the sum is 21.

The square root of 252147 is about 502.1424100791. The cubic root of 252147 is about 63.1758753995.

Adding to 252147 its reverse (741252), we get a palindrome (993399).

The spelling of 252147 in words is "two hundred fifty-two thousand, one hundred forty-seven".