25071642 has 24 divisors (see below), whose sum is σ = 54853344. Its totient is φ = 8275464.

The previous prime is 25071619. The next prime is 25071643. The reversal of 25071642 is 24617052.

It is not an unprimeable number, because it can be changed into a prime (25071643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4908 + ... + 8615.

It is an arithmetic number, because the mean of its divisors is an integer number (2285556).

Almost surely, 2^25071642 is an apocalyptic number.

25071642 is an abundant number, since it is smaller than the sum of its proper divisors (29781702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25071642 is a wasteful number, since it uses less digits than its factorization.

25071642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13634 (or 13631 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 25071642 is about 5007.1590747649. The cubic root of 25071642 is about 292.6808174126.

Adding to 25071642 its reverse (24617052), we get a palindrome (49688694).

The spelling of 25071642 in words is "twenty-five million, seventy-one thousand, six hundred forty-two".