25145261 has 4 divisors (see below), whose sum is σ = 26624412. Its totient is φ = 23666112.

The previous prime is 25145221. The next prime is 25145273. The reversal of 25145261 is 16254152.

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 14969161 + 10176100 = 3869^2 + 3190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25145261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25145261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25145201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739550 + ... + 739583.

It is an arithmetic number, because the mean of its divisors is an integer number (6656103).

Almost surely, 2^25145261 is an apocalyptic number.

It is an amenable number.

25145261 is a deficient number, since it is larger than the sum of its proper divisors (1479151).

25145261 is a wasteful number, since it uses less digits than its factorization.

25145261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479150.

The product of its digits is 2400, while the sum is 26.

The square root of 25145261 is about 5014.5050603225. The cubic root of 25145261 is about 292.9670081316.

The spelling of 25145261 in words is "twenty-five million, one hundred forty-five thousand, two hundred sixty-one".