25649153 has 6 divisors (see below), whose sum is σ = 25828374. Its totient is φ = 25471136.

The previous prime is 25649147. The next prime is 25649159. The reversal of 25649153 is 35194652.

It is an interprime number because it is at equal distance from previous prime (25649147) and next prime (25649159).

It can be written as a sum of positive squares in 3 ways, for example, as 20948929 + 4700224 = 4577^2 + 2168^2 .

It is not a de Polignac number, because 25649153 - 2⁸ = 25648897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25649159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29501 + ... + 30357.

It is an arithmetic number, because the mean of its divisors is an integer number (4304729).

It is a Proth number, since it is equal to 3131 ⋅ 2¹³ + 1 and 3131 < 2¹³.

Almost surely, 2^25649153 is an apocalyptic number.

It is an amenable number.

25649153 is a deficient number, since it is larger than the sum of its proper divisors (179221).

25649153 is an frugal number, since it uses more digits than its factorization.

25649153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203 (or 1030 counting only the distinct ones).

The product of its digits is 32400, while the sum is 35.

The square root of 25649153 is about 5064.4992842333. The cubic root of 25649153 is about 294.9110255468.

The spelling of 25649153 in words is "twenty-five million, six hundred forty-nine thousand, one hundred fifty-three".