25134540 has 24 divisors (see below), whose sum is σ = 70376880. Its totient is φ = 6702528.

The previous prime is 25134539. The next prime is 25134547. The reversal of 25134540 is 4543152.

It is a self number, because there is not a number n which added to its sum of digits gives 25134540.

It is not an unprimeable number, because it can be changed into a prime (25134547) 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, 209395 + ... + 209514.

It is an arithmetic number, because the mean of its divisors is an integer number (2932370).

Almost surely, 2^25134540 is an apocalyptic number.

25134540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25134540 is an abundant number, since it is smaller than the sum of its proper divisors (45242340).

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

25134540 is a wasteful number, since it uses less digits than its factorization.

25134540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418921 (or 418919 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 25134540 is about 5013.4359475314. The cubic root of 25134540 is about 292.9253654832.

Adding to 25134540 its reverse (4543152), we get a palindrome (29677692).

The spelling of 25134540 in words is "twenty-five million, one hundred thirty-four thousand, five hundred forty".