80406542 has 4 divisors (see below), whose sum is σ = 120609816. Its totient is φ = 40203270.

The previous prime is 80406539. The next prime is 80406559. The reversal of 80406542 is 24560408.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20101634 + ... + 20101637.

It is an arithmetic number, because the mean of its divisors is an integer number (30152454).

Almost surely, 2^80406542 is an apocalyptic number.

80406542 is a deficient number, since it is larger than the sum of its proper divisors (40203274).

80406542 is a wasteful number, since it uses less digits than its factorization.

80406542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40203273.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 80406542 is about 8966.9694992232. The cubic root of 80406542 is about 431.6155952624.

The spelling of 80406542 in words is "eighty million, four hundred six thousand, five hundred forty-two".