25070042 has 4 divisors (see below), whose sum is σ = 37605066. Its totient is φ = 12535020.

The previous prime is 25070039. The next prime is 25070057. The reversal of 25070042 is 24007052.

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., 22080601 + 2989441 = 4699^2 + 1729^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25069996 and 25070023.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6267509 + ... + 6267512.

Almost surely, 2^25070042 is an apocalyptic number.

25070042 is a deficient number, since it is larger than the sum of its proper divisors (12535024).

25070042 is a wasteful number, since it uses less digits than its factorization.

25070042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12535023.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 25070042 is about 5006.9993009786. Note that the first 3 decimals coincide. The cubic root of 25070042 is about 292.6745912645.

Adding to 25070042 its reverse (24007052), we get a palindrome (49077094).

The spelling of 25070042 in words is "twenty-five million, seventy thousand, forty-two".