87147252 has 30 divisors (see below), whose sum is σ = 227820978. Its totient is φ = 29048976.

The previous prime is 87147251. The next prime is 87147271. The reversal of 87147252 is 25274178.

It can be written as a sum of positive squares in only one way, i.e., 56610576 + 30536676 = 7524^2 + 5526^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87147251) 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 9 ways as a sum of consecutive naturals, for example, 134163 + ... + 134810.

Almost surely, 2^87147252 is an apocalyptic number.

It is an amenable number.

87147252 is an abundant number, since it is smaller than the sum of its proper divisors (140673726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87147252 is a wasteful number, since it uses less digits than its factorization.

87147252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268989 (or 268978 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 87147252 is about 9335.2692516070. The cubic root of 87147252 is about 443.3546138364.

The spelling of 87147252 in words is "eighty-seven million, one hundred forty-seven thousand, two hundred fifty-two".