12578042 has 4 divisors (see below), whose sum is σ = 18867066. Its totient is φ = 6289020.

The previous prime is 12578029. The next prime is 12578047. The reversal of 12578042 is 24087521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24087521 = 17 ⋅1416913.

It can be written as a sum of positive squares in only one way, i.e., 9616201 + 2961841 = 3101^2 + 1721^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12577996 and 12578014.

It is not an unprimeable number, because it can be changed into a prime (12578047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3144509 + ... + 3144512.

Almost surely, 2^12578042 is an apocalyptic number.

12578042 is a deficient number, since it is larger than the sum of its proper divisors (6289024).

12578042 is an equidigital number, since it uses as much as digits as its factorization.

12578042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6289023.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 12578042 is about 3546.5535382960. The cubic root of 12578042 is about 232.5614251702.

The spelling of 12578042 in words is "twelve million, five hundred seventy-eight thousand, forty-two".