25041649 has 4 divisors (see below), whose sum is σ = 25067764. Its totient is φ = 25015536.

The previous prime is 25041623. The next prime is 25041661. The reversal of 25041649 is 94614052.

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 18447025 + 6594624 = 4295^2 + 2568^2 .

It is a cyclic number.

It is not a de Polignac number, because 25041649 - 2¹¹ = 25039601 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 25041649.

It is not an unprimeable number, because it can be changed into a prime (25041619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11562 + ... + 13555.

It is an arithmetic number, because the mean of its divisors is an integer number (6266941).

Almost surely, 2^25041649 is an apocalyptic number.

It is an amenable number.

25041649 is a deficient number, since it is larger than the sum of its proper divisors (26115).

25041649 is an equidigital number, since it uses as much as digits as its factorization.

25041649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26114.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 25041649 is about 5004.1631668042. The cubic root of 25041649 is about 292.5640602867.

The spelling of 25041649 in words is "twenty-five million, forty-one thousand, six hundred forty-nine".