25140642 has 8 divisors (see below), whose sum is σ = 50281296. Its totient is φ = 8380212.

The previous prime is 25140641. The next prime is 25140677. The reversal of 25140642 is 24604152.

It is a sphenic number, since it is the product of 3 distinct primes.

25140642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (25140641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2095048 + ... + 2095059.

It is an arithmetic number, because the mean of its divisors is an integer number (6285162).

Almost surely, 2^25140642 is an apocalyptic number.

25140642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25140642 is a wasteful number, since it uses less digits than its factorization.

25140642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4190112.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 25140642 is about 5014.0444752714. The cubic root of 25140642 is about 292.9490684030.

Adding to 25140642 its reverse (24604152), we get a palindrome (49744794).

The spelling of 25140642 in words is "twenty-five million, one hundred forty thousand, six hundred forty-two".