25603201 has 16 divisors (see below), whose sum is σ = 28823760. Its totient is φ = 22579200.

The previous prime is 25603199. The next prime is 25603211. The reversal of 25603201 is 10230652.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2563201 + 23040000 = 1601^2 + 4800^2 .

It is a 2-Lehmer number, since φ(25603201) divides (25603201-1)².

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 25603201 - 2¹ = 25603199 is a prime.

It is a deceptive number, since it divides R_25603200.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25603211) 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, 42301 + ... + 42901.

It is an arithmetic number, because the mean of its divisors is an integer number (1801485).

It is a Poulet number, since it divides 2^25603200-1.

Almost surely, 2^25603201 is an apocalyptic number.

It is an amenable number.

25603201 is a deficient number, since it is larger than the sum of its proper divisors (3220559).

25603201 is a wasteful number, since it uses less digits than its factorization.

25603201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 25603201 is about 5059.9605729689. The cubic root of 25603201 is about 294.7348033218.

Adding to 25603201 its reverse (10230652), we get a palindrome (35833853).

The spelling of 25603201 in words is "twenty-five million, six hundred three thousand, two hundred one".