25659049 has 16 divisors (see below), whose sum is σ = 28449792. Its totient is φ = 22995648.

The previous prime is 25659047. The next prime is 25659061. The reversal of 25659049 is 94095652.

It is not a de Polignac number, because 25659049 - 2¹ = 25659047 is a prime.

It is a super-4 number, since 4×25659049⁴ (a number of 31 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25659047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114952 + ... + 115174.

It is an arithmetic number, because the mean of its divisors is an integer number (1778112).

Almost surely, 2^25659049 is an apocalyptic number.

It is an amenable number.

25659049 is a deficient number, since it is larger than the sum of its proper divisors (2790743).

25659049 is a wasteful number, since it uses less digits than its factorization.

25659049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 25659049 is about 5065.4761868950. The cubic root of 25659049 is about 294.9489483619.

It can be divided in two parts, 256 and 59049, that multiplied together give a square (15116544 = 3888²).

The spelling of 25659049 in words is "twenty-five million, six hundred fifty-nine thousand, forty-nine".