81342410 has 16 divisors (see below), whose sum is σ = 146519496. Its totient is φ = 32514048.

The previous prime is 81342377. The next prime is 81342431. The reversal of 81342410 is 1424318.

It can be written as a sum of positive squares in 4 ways, for example, as 81234169 + 108241 = 9013^2 + 329^2 .

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, 24362 + ... + 27498.

Almost surely, 2^81342410 is an apocalyptic number.

81342410 is a deficient number, since it is larger than the sum of its proper divisors (65177086).

81342410 is a wasteful number, since it uses less digits than its factorization.

81342410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5737.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 81342410 is about 9019.0027164870. The cubic root of 81342410 is about 433.2836938537.

Adding to 81342410 its reverse (1424318), we get a palindrome (82766728).

The spelling of 81342410 in words is "eighty-one million, three hundred forty-two thousand, four hundred ten".