25442740 has 24 divisors (see below), whose sum is σ = 54109440. Its totient is φ = 10047648.

The previous prime is 25442731. The next prime is 25442749. The reversal of 25442740 is 4724452.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25442731) and next prime (25442749).

It is a junction number, because it is equal to n+sod(n) for n = 25442699 and 25442708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25442749) 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 7 ways as a sum of consecutive naturals, for example, 6472 + ... + 9631.

It is an arithmetic number, because the mean of its divisors is an integer number (2254560).

Almost surely, 2^25442740 is an apocalyptic number.

25442740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25442740 is an abundant number, since it is smaller than the sum of its proper divisors (28666700).

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

25442740 is a wasteful number, since it uses less digits than its factorization.

25442740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16191 (or 16189 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 25442740 is about 5044.0796980222. The cubic root of 25442740 is about 294.1177895058.

The spelling of 25442740 in words is "twenty-five million, four hundred forty-two thousand, seven hundred forty".