81042526 has 16 divisors (see below), whose sum is σ = 124130448. Its totient is φ = 39672000.

The previous prime is 81042517. The next prime is 81042541. The reversal of 81042526 is 62524018.

It is a junction number, because it is equal to n+sod(n) for n = 81042494 and 81042503.

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, 27001 + ... + 29851.

It is an arithmetic number, because the mean of its divisors is an integer number (7758153).

Almost surely, 2^81042526 is an apocalyptic number.

81042526 is a deficient number, since it is larger than the sum of its proper divisors (43087922).

81042526 is a wasteful number, since it uses less digits than its factorization.

81042526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3147.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 81042526 is about 9002.3622455442. The cubic root of 81042526 is about 432.7505777278.

The spelling of 81042526 in words is "eighty-one million, forty-two thousand, five hundred twenty-six".