81260735 has 8 divisors (see below), whose sum is σ = 98688240. Its totient is φ = 64225024.

The previous prime is 81260719. The next prime is 81260761. The reversal of 81260735 is 53706218.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 81260735 - 2⁴ = 81260719 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97490 + ... + 98319.

It is an arithmetic number, because the mean of its divisors is an integer number (12336030).

Almost surely, 2^81260735 is an apocalyptic number.

81260735 is a deficient number, since it is larger than the sum of its proper divisors (17427505).

81260735 is a wasteful number, since it uses less digits than its factorization.

81260735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195897.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 81260735 is about 9014.4736396531. The cubic root of 81260735 is about 433.1386268598.

The spelling of 81260735 in words is "eighty-one million, two hundred sixty thousand, seven hundred thirty-five".