81292606 has 16 divisors (see below), whose sum is σ = 129309264. Its totient is φ = 38196864.

The previous prime is 81292567. The next prime is 81292609. The reversal of 81292606 is 60629218.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81292609) 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, 27601 + ... + 30403.

It is an arithmetic number, because the mean of its divisors is an integer number (8081829).

Almost surely, 2^81292606 is an apocalyptic number.

81292606 is a deficient number, since it is larger than the sum of its proper divisors (48016658).

81292606 is a wasteful number, since it uses less digits than its factorization.

81292606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3675.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 81292606 is about 9016.2412345722. The cubic root of 81292606 is about 433.1952460737.

The spelling of 81292606 in words is "eighty-one million, two hundred ninety-two thousand, six hundred six".