25720754 has 4 divisors (see below), whose sum is σ = 38581134. Its totient is φ = 12860376.

The previous prime is 25720729. The next prime is 25720759. The reversal of 25720754 is 45702752.

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

It can be written as a sum of positive squares in only one way, i.e., 24730729 + 990025 = 4973^2 + 995^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25720754.

It is not an unprimeable number, because it can be changed into a prime (25720759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6430187 + ... + 6430190.

Almost surely, 2^25720754 is an apocalyptic number.

25720754 is a deficient number, since it is larger than the sum of its proper divisors (12860380).

25720754 is a wasteful number, since it uses less digits than its factorization.

25720754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12860379.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 25720754 is about 5071.5632698410. The cubic root of 25720754 is about 295.1851906237.

The spelling of 25720754 in words is "twenty-five million, seven hundred twenty thousand, seven hundred fifty-four".