252520987 has 4 divisors (see below), whose sum is σ = 254755800. Its totient is φ = 250286176.

The previous prime is 252520949. The next prime is 252520993. The reversal of 252520987 is 789025252.

252520987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 252520987 - 2⁷ = 252520859 is a prime.

It is a Smith number, since the sum of its digits (40) 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 (252520937) 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, 1117237 + ... + 1117462.

It is an arithmetic number, because the mean of its divisors is an integer number (63688950).

Almost surely, 2^252520987 is an apocalyptic number.

252520987 is a deficient number, since it is larger than the sum of its proper divisors (2234813).

252520987 is a wasteful number, since it uses less digits than its factorization.

252520987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234812.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 252520987 is about 15890.9089419076. The cubic root of 252520987 is about 632.0709433727.

The spelling of 252520987 in words is "two hundred fifty-two million, five hundred twenty thousand, nine hundred eighty-seven".