81296502 has 16 divisors (see below), whose sum is σ = 185820672. Its totient is φ = 23227560.

The previous prime is 81296489. The next prime is 81296503. The reversal of 81296502 is 20569218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81296503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 967774 + ... + 967857.

It is an arithmetic number, because the mean of its divisors is an integer number (11613792).

Almost surely, 2^81296502 is an apocalyptic number.

81296502 is an abundant number, since it is smaller than the sum of its proper divisors (104524170).

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

81296502 is a wasteful number, since it uses less digits than its factorization.

81296502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935643.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 81296502 is about 9016.4572865400. The cubic root of 81296502 is about 433.2021663493.

The spelling of 81296502 in words is "eighty-one million, two hundred ninety-six thousand, five hundred two".