81260202 has 16 divisors (see below), whose sum is σ = 164099520. Its totient is φ = 26823552.

The previous prime is 81260159. The next prime is 81260203. The reversal of 81260202 is 20206218.

It is not an unprimeable number, because it can be changed into a prime (81260203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65127 + ... + 66362.

It is an arithmetic number, because the mean of its divisors is an integer number (10256220).

Almost surely, 2^81260202 is an apocalyptic number.

81260202 is an abundant number, since it is smaller than the sum of its proper divisors (82839318).

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

81260202 is a wasteful number, since it uses less digits than its factorization.

81260202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131597.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 81260202 is about 9014.4440760371. Note that the first 3 decimals coincide. The cubic root of 81260202 is about 433.1376798530.

The spelling of 81260202 in words is "eighty-one million, two hundred sixty thousand, two hundred two".