252145471 has 4 divisors (see below), whose sum is σ = 253256472. Its totient is φ = 251034472.

The previous prime is 252145469. The next prime is 252145477. The reversal of 252145471 is 174541252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 252145471 - 2¹ = 252145469 is a prime.

It is a super-3 number, since 3×252145471³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252145477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555160 + ... + 555613.

It is an arithmetic number, because the mean of its divisors is an integer number (63314118).

Almost surely, 2^252145471 is an apocalyptic number.

252145471 is a deficient number, since it is larger than the sum of its proper divisors (1111001).

252145471 is a wasteful number, since it uses less digits than its factorization.

252145471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111000.

The product of its digits is 11200, while the sum is 31.

The square root of 252145471 is about 15879.0891111550. The cubic root of 252145471 is about 631.7574770140.

The spelling of 252145471 in words is "two hundred fifty-two million, one hundred forty-five thousand, four hundred seventy-one".