25720842 has 16 divisors (see below), whose sum is σ = 58790592. Its totient is φ = 7348800.

The previous prime is 25720841. The next prime is 25720853. The reversal of 25720842 is 24802752.

It is not an unprimeable number, because it can be changed into a prime (25720841) 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, 306159 + ... + 306242.

It is an arithmetic number, because the mean of its divisors is an integer number (3674412).

Almost surely, 2^25720842 is an apocalyptic number.

25720842 is an abundant number, since it is smaller than the sum of its proper divisors (33069750).

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

25720842 is a wasteful number, since it uses less digits than its factorization.

25720842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612413.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 25720842 is about 5071.5719456595. The cubic root of 25720842 is about 295.1855272684.

It can be divided in two parts, 25720 and 842, that added together give a palindrome (26562).

The spelling of 25720842 in words is "twenty-five million, seven hundred twenty thousand, eight hundred forty-two".