252641281 has 4 divisors (see below), whose sum is σ = 252754992. Its totient is φ = 252527572.

The previous prime is 252641261. The next prime is 252641287. The reversal of 252641281 is 182146252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 252641281 - 2⁷ = 252641153 is a prime.

It is a super-2 number, since 2×252641281² = 127655233730641922, which contains 22 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 not an unprimeable number, because it can be changed into a prime (252641287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53455 + ... + 57988.

It is an arithmetic number, because the mean of its divisors is an integer number (63188748).

It is a Proth number, since it is equal to 3855 ⋅ 2¹⁶ + 1 and 3855 < 2¹⁶.

Almost surely, 2^252641281 is an apocalyptic number.

It is an amenable number.

252641281 is a deficient number, since it is larger than the sum of its proper divisors (113711).

252641281 is a wasteful number, since it uses less digits than its factorization.

252641281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113710.

The product of its digits is 7680, while the sum is 31.

The square root of 252641281 is about 15894.6934855630. The cubic root of 252641281 is about 632.1712944665.

The spelling of 252641281 in words is "two hundred fifty-two million, six hundred forty-one thousand, two hundred eighty-one".