81254325 has 12 divisors (see below), whose sum is σ = 134340608. Its totient is φ = 43335600.

The previous prime is 81254321. The next prime is 81254363. The reversal of 81254325 is 52345218.

It is not a de Polignac number, because 81254325 - 2² = 81254321 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81254292 and 81254301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81254321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 541621 + ... + 541770.

Almost surely, 2^81254325 is an apocalyptic number.

It is an amenable number.

81254325 is a deficient number, since it is larger than the sum of its proper divisors (53086283).

81254325 is a wasteful number, since it uses less digits than its factorization.

81254325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083404 (or 1083399 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 81254325 is about 9014.1180933023. The cubic root of 81254325 is about 433.1272376297.

The spelling of 81254325 in words is "eighty-one million, two hundred fifty-four thousand, three hundred twenty-five".