25742442 has 32 divisors (see below), whose sum is σ = 56758464. Its totient is φ = 7718400.

The previous prime is 25742429. The next prime is 25742443. The reversal of 25742442 is 24424752.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (25742443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4392 + ... + 8412.

It is an arithmetic number, because the mean of its divisors is an integer number (1773702).

Almost surely, 2^25742442 is an apocalyptic number.

25742442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 25742442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28379232).

25742442 is an abundant number, since it is smaller than the sum of its proper divisors (31016022).

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

25742442 is a wasteful number, since it uses less digits than its factorization.

25742442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4134.

The product of its digits is 17920, while the sum is 30.

The square root of 25742442 is about 5073.7010160237. The cubic root of 25742442 is about 295.2681350279.

The spelling of 25742442 in words is "twenty-five million, seven hundred forty-two thousand, four hundred forty-two".