25140545 has 4 divisors (see below), whose sum is σ = 30168660. Its totient is φ = 20112432.

The previous prime is 25140527. The next prime is 25140589. The reversal of 25140545 is 54504152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7230721 + 17909824 = 2689^2 + 4232^2 .

It is a cyclic number.

It is not a de Polignac number, because 25140545 - 2⁶ = 25140481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2514050 + ... + 2514059.

It is an arithmetic number, because the mean of its divisors is an integer number (7542165).

Almost surely, 2^25140545 is an apocalyptic number.

It is an amenable number.

25140545 is a deficient number, since it is larger than the sum of its proper divisors (5028115).

25140545 is an equidigital number, since it uses as much as digits as its factorization.

25140545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5028114.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 25140545 is about 5014.0348024321. The cubic root of 25140545 is about 292.9486916412.

Adding to 25140545 its reverse (54504152), we get a palindrome (79644697).

The spelling of 25140545 in words is "twenty-five million, one hundred forty thousand, five hundred forty-five".