25000642 has 16 divisors (see below), whose sum is σ = 39818520. Its totient is φ = 11731968.

The previous prime is 25000627. The next prime is 25000643. The reversal of 25000642 is 24600052.

It can be written as a sum of positive squares in 4 ways, for example, as 23126481 + 1874161 = 4809^2 + 1369^2 .

It is not an unprimeable number, because it can be changed into a prime (25000643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14734 + ... + 16342.

Almost surely, 2^25000642 is an apocalyptic number.

25000642 is a deficient number, since it is larger than the sum of its proper divisors (14817878).

25000642 is a wasteful number, since it uses less digits than its factorization.

25000642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 25000642 is about 5000.0641995878. The cubic root of 25000642 is about 292.4042767590.

Adding to 25000642 its reverse (24600052), we get a palindrome (49600694).

The spelling of 25000642 in words is "twenty-five million, six hundred forty-two", and thus it is an aban number.