25220601 has 24 divisors (see below), whose sum is σ = 41799680. Its totient is φ = 14354496.

The previous prime is 25220597. The next prime is 25220641. The reversal of 25220601 is 10602252.

It is not a de Polignac number, because 25220601 - 2² = 25220597 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 (25220641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19080 + ... + 20358.

Almost surely, 2^25220601 is an apocalyptic number.

25220601 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25220601 is a deficient number, since it is larger than the sum of its proper divisors (16579079).

25220601 is a wasteful number, since it uses less digits than its factorization.

25220601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605 (or 1602 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 25220601 is about 5022.0116487320. The cubic root of 25220601 is about 293.2593114130.

Adding to 25220601 its reverse (10602252), we get a palindrome (35822853).

The spelling of 25220601 in words is "twenty-five million, two hundred twenty thousand, six hundred one".