25205142 has 16 divisors (see below), whose sum is σ = 51121152. Its totient is φ = 8283240.

The previous prime is 25205137. The next prime is 25205149. The reversal of 25205142 is 24150252.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25205149) 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, 29158 + ... + 30009.

It is an arithmetic number, because the mean of its divisors is an integer number (3195072).

Almost surely, 2^25205142 is an apocalyptic number.

25205142 is an abundant number, since it is smaller than the sum of its proper divisors (25916010).

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

25205142 is a wasteful number, since it uses less digits than its factorization.

25205142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59243.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 25205142 is about 5020.4722885402. The cubic root of 25205142 is about 293.1993812752.

Adding to 25205142 its reverse (24150252), we get a palindrome (49355394).

The spelling of 25205142 in words is "twenty-five million, two hundred five thousand, one hundred forty-two".