77005142 has 4 divisors (see below), whose sum is σ = 115507716. Its totient is φ = 38502570.

The previous prime is 77005139. The next prime is 77005151. The reversal of 77005142 is 24150077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24150077 = 7 ⋅3450011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19251284 + ... + 19251287.

It is an arithmetic number, because the mean of its divisors is an integer number (28876929).

Almost surely, 2^77005142 is an apocalyptic number.

77005142 is a deficient number, since it is larger than the sum of its proper divisors (38502574).

77005142 is a wasteful number, since it uses less digits than its factorization.

77005142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38502573.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 77005142 is about 8775.2573751429. The cubic root of 77005142 is about 425.4415563085.

The spelling of 77005142 in words is "seventy-seven million, five thousand, one hundred forty-two".