81250026 has 64 divisors (see below), whose sum is σ = 192157056. Its totient is φ = 22579200.

The previous prime is 81250019. The next prime is 81250027. The reversal of 81250026 is 62005218.

It is a junction number, because it is equal to n+sod(n) for n = 81249978 and 81250005.

It is not an unprimeable number, because it can be changed into a prime (81250027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240930 + ... + 241266.

It is an arithmetic number, because the mean of its divisors is an integer number (3002454).

Almost surely, 2^81250026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81250026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96078528).

81250026 is an abundant number, since it is smaller than the sum of its proper divisors (110907030).

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

81250026 is a wasteful number, since it uses less digits than its factorization.

81250026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 81250026 is about 9013.8796308804. The cubic root of 81250026 is about 433.1195988699.

The spelling of 81250026 in words is "eighty-one million, two hundred fifty thousand, twenty-six".