25740146 has 8 divisors (see below), whose sum is σ = 38721900. Its totient is φ = 12832848.

The previous prime is 25740131. The next prime is 25740149. The reversal of 25740146 is 64104752.

It can be written as a sum of positive squares in 2 ways, for example, as 22934521 + 2805625 = 4789^2 + 1675^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×25740146² = 1325110232202632, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25740149) 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 3 ways as a sum of consecutive naturals, for example, 17741 + ... + 19136.

Almost surely, 2^25740146 is an apocalyptic number.

25740146 is a deficient number, since it is larger than the sum of its proper divisors (12981754).

25740146 is a wasteful number, since it uses less digits than its factorization.

25740146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37228.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 25740146 is about 5073.4747461676. The cubic root of 25740146 is about 295.2593563245.

Adding to 25740146 its reverse (64104752), we get a palindrome (89844898).

The spelling of 25740146 in words is "twenty-five million, seven hundred forty thousand, one hundred forty-six".