25707142 has 4 divisors (see below), whose sum is σ = 38560716. Its totient is φ = 12853570.

The previous prime is 25707139. The next prime is 25707151. The reversal of 25707142 is 24170752.

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

It is a self number, because there is not a number n which added to its sum of digits gives 25707142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6426784 + ... + 6426787.

It is an arithmetic number, because the mean of its divisors is an integer number (9640179).

Almost surely, 2^25707142 is an apocalyptic number.

25707142 is a deficient number, since it is larger than the sum of its proper divisors (12853574).

25707142 is a wasteful number, since it uses less digits than its factorization.

25707142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12853573.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 25707142 is about 5070.2210997155. The cubic root of 25707142 is about 295.1331085600.

Adding to 25707142 its reverse (24170752), we get a palindrome (49877894).

The spelling of 25707142 in words is "twenty-five million, seven hundred seven thousand, one hundred forty-two".