86507242 has 4 divisors (see below), whose sum is σ = 129760866. Its totient is φ = 43253620.

The previous prime is 86507233. The next prime is 86507243. The reversal of 86507242 is 24270568.

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

It can be written as a sum of positive squares in only one way, i.e., 80838081 + 5669161 = 8991^2 + 2381^2 .

It is a junction number, because it is equal to n+sod(n) for n = 86507198 and 86507207.

It is not an unprimeable number, because it can be changed into a prime (86507243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21626809 + ... + 21626812.

Almost surely, 2^86507242 is an apocalyptic number.

86507242 is a deficient number, since it is larger than the sum of its proper divisors (43253624).

86507242 is a wasteful number, since it uses less digits than its factorization.

86507242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43253623.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 86507242 is about 9300.9269430525. The cubic root of 86507242 is about 442.2666129647.

The spelling of 86507242 in words is "eighty-six million, five hundred seven thousand, two hundred forty-two".