77745242 has 8 divisors (see below), whose sum is σ = 117083232. Its totient is φ = 38717500.

The previous prime is 77745229. The next prime is 77745257. The reversal of 77745242 is 24254777.

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

It is a junction number, because it is equal to n+sod(n) for n = 77745196 and 77745205.

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 in 3 ways as a sum of consecutive naturals, for example, 76934 + ... + 77937.

It is an arithmetic number, because the mean of its divisors is an integer number (14635404).

Almost surely, 2^77745242 is an apocalyptic number.

77745242 is a deficient number, since it is larger than the sum of its proper divisors (39337990).

77745242 is a wasteful number, since it uses less digits than its factorization.

77745242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155124.

The product of its digits is 109760, while the sum is 38.

The square root of 77745242 is about 8817.3262387189. The cubic root of 77745242 is about 426.8001924480.

The spelling of 77745242 in words is "seventy-seven million, seven hundred forty-five thousand, two hundred forty-two".