81742954 has 8 divisors (see below), whose sum is σ = 122696640. Its totient is φ = 40844076.

The previous prime is 81742949. The next prime is 81742979. The reversal of 81742954 is 45924718.

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

It is a super-2 number, since 2×81742954² = 13363821057292232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9744 + ... + 16075.

It is an arithmetic number, because the mean of its divisors is an integer number (15337080).

Almost surely, 2^81742954 is an apocalyptic number.

81742954 is a deficient number, since it is larger than the sum of its proper divisors (40953686).

81742954 is a wasteful number, since it uses less digits than its factorization.

81742954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27404.

The product of its digits is 80640, while the sum is 40.

The square root of 81742954 is about 9041.1810069260. The cubic root of 81742954 is about 433.9937174793.

The spelling of 81742954 in words is "eighty-one million, seven hundred forty-two thousand, nine hundred fifty-four".