81248502 has 8 divisors (see below), whose sum is σ = 162497016. Its totient is φ = 27082832.

The previous prime is 81248501. The next prime is 81248507. The reversal of 81248502 is 20584218.

It is a sphenic number, since it is the product of 3 distinct primes.

81248502 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 81248502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81248501) 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, 6770703 + ... + 6770714.

It is an arithmetic number, because the mean of its divisors is an integer number (20312127).

Almost surely, 2^81248502 is an apocalyptic number.

81248502 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81248502 is a wasteful number, since it uses less digits than its factorization.

81248502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13541422.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 81248502 is about 9013.7950941876. The cubic root of 81248502 is about 433.1168908568.

The spelling of 81248502 in words is "eighty-one million, two hundred forty-eight thousand, five hundred two".