25347540 has 24 divisors (see below), whose sum is σ = 70973280. Its totient is φ = 6759328.

The previous prime is 25347533. The next prime is 25347547. The reversal of 25347540 is 4574352.

It is an interprime number because it is at equal distance from previous prime (25347533) and next prime (25347547).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 25347498 and 25347507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25347547) 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, 211170 + ... + 211289.

It is an arithmetic number, because the mean of its divisors is an integer number (2957220).

Almost surely, 2^25347540 is an apocalyptic number.

25347540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25347540 is an abundant number, since it is smaller than the sum of its proper divisors (45625740).

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

25347540 is a wasteful number, since it uses less digits than its factorization.

25347540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422471 (or 422469 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 25347540 is about 5034.6340482700. The cubic root of 25347540 is about 293.7504940387.

The spelling of 25347540 in words is "twenty-five million, three hundred forty-seven thousand, five hundred forty".