78042754 has 4 divisors (see below), whose sum is σ = 117064134. Its totient is φ = 39021376.

The previous prime is 78042751. The next prime is 78042787. The reversal of 78042754 is 45724087.

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

It can be written as a sum of positive squares in only one way, i.e., 61858225 + 16184529 = 7865^2 + 4023^2 .

It is not an unprimeable number, because it can be changed into a prime (78042751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19510687 + ... + 19510690.

Almost surely, 2^78042754 is an apocalyptic number.

78042754 is a deficient number, since it is larger than the sum of its proper divisors (39021380).

78042754 is a wasteful number, since it uses less digits than its factorization.

78042754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39021379.

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 78042754 is about 8834.1810033528. The cubic root of 78042754 is about 427.3439194020.

It can be divided in two parts, 780 and 42754, that added together give a palindrome (43534).

The spelling of 78042754 in words is "seventy-eight million, forty-two thousand, seven hundred fifty-four".